In the 1998 Clinton impeachment proceedings, only one legal scholar was called as a joint witness: Michael J. Gerhardt, now a Professor of Law at the University of North Carolina at Chapel Hill and a prolific expert on subjects of constitutional history, the legislative process, and impeachment. With the impeachment inquiry into President Donald Trump well underway, he recommends five books crucial to understanding the subject.

Defined by University of Chicago historian Kathleen Belew, white supremacy is a “broad system of laws, norms and customs that create a society with unequal opportunities for people based on race”. It persists to this day, and has surprising intersections with issues of labor and women’s reproduction. Here, she recommends books for coming to grips with the history of this complex topic.

New England: it’s the northeastern-most region of the United States, encompasses six states, is slightly larger than England itself, and half of it is rural, remote Maine. Yale Professor Mark Peterson introduces us to the rich history of New England, going back to its Puritan roots and the Massachusetts Bay Colony.

Princeton Professor Imani Perry—a prolific scholar of African American Studies whose biography of Lorraine Hansberry, Looking For Lorraine,  won the 2019 PEN Biography Prize—recommends five books she considers essential to an understanding of the history of black life in America.

Is Senate Majority Leader Mitch McConnell just as important as President Trump? Julian E. Zelizer, Princeton historian and CNN Political Analyst, thinks so—and he argues that to understand American politics, you have to understand Congress. He recommends the best books for getting to grips with the nuts and bolts of the Senate and House of Representatives.

The idea of Boston as “a place of revolutionary fervour because liberty is somehow baked into its bones” is loaded with a “very heavy dose of self-mythologizing,” says American historian Jane Kamensky. Here, the Harvard professor lifts the veil on this quintessential New England city and recommends five books for understanding its history

With a keen awareness of the vicissitudes of history and an ironic sense of national identity, Belgium is a country others could learn a lot from. Historian Martin Conway recommends some books to better understand Belgium/België/Belgique.

When George W Bush declared that America “has never been an empire,” he elided a half century of colonial rule over its overseas dependencies. But American expansionism has manifested in other forms too, says A G Hopkins, imperial historian and author of a panoramic new work of American history.

When William of Orange came from Holland to take the English throne in 1688, was it a foreign invasion, or a revolution from within? Yale historian, Steven Pincus, talks us through the conflicting views on the Glorious Revolution and argues for a new perspective.

Gershon Hundert, Leanor Segal Professor of Jewish Studies at McGill University, talks about recent revisions to the conventional understanding of Jewish history and selects the most influential current writing on the subject.

In the 20th century, Germany suffered defeat in two world wars and withstood two kinds of dictatorship. Yet today it is Europe’s strongest economy. Hester Vaizey, fellow of Clare College, Cambridge, and author of Born in the GDR, selects five brilliant books on a tumultuous century.

The past may be a foreign country, but the world portrayed in the art of the Dutch Masters is not so very far from our own, says Adam Eaker of the Metropolitan Museum of Art in New York. For a society that struggles with materialism and consumption, there are a lot of lessons to be learnt from the 17th century Golden Age.

The failure of the Stuarts to win back the English or Scottish throne changed the course of history, enabling the buildup of a highly centralized British state and, possibly, America’s war for independence. Murray Pittock chooses the best books on Jacobitism, the 18th century phenomenon that nearly overthrew the British government.

Which are the best books on American history? Brent Glass, Director Emeritus of the Smithsonian’s National Museum of American History, the world’s largest museum devoted to telling the story of America, chooses five standout books in a crowded field.

The rise of China means the study of its history is suddenly in vogue. But, says historian Norman Davies, there’s as much to learn, if not more, from looking at states that have disappeared

A “powerful and aggravating absence of consensus” came to define the Irish political experience, says the historian Richard Bourke. Here he picks the best books for gaining a range of perspectives on Irish history, singling out James Joyce as offering insight into the divergence of nationalist opinion.

China’s minority peoples have shaped the country’s history and its identity. They led its most successful dynasty, the Qing. But nowadays, their role has been reduced to that of tourist spectacle. Beijing-based writer James Palmer picks the best books on China’s ethnic minorities.

More than 100 years after the Armenian genocide, author Tom de Waal chooses books that sidestep the politics and bring us back to the human story. He picks the best memoirs of the Armenian genocide.

Americans remember Reagan fondly, but what did the Gipper really stand for? The historian chooses the best books on Ronald Reagan and his time.

Their language indicates they originated in India, but the music they play is world music. Some will tell your fortune but they don't believe in supernatural powers. Yaron Matras recommends the best books and dispels some common myths about Gypsies.

The friend and adviser to Martin Luther King Jr, who contributed to the ‘I Have a Dream’ speech, tells us how great speeches come about and what they can mean.

The historian and biographer of London Peter Ackroyd picks five books that shine a light on parts of this vast, complex and confusing city where, he says, pathos and pantomime meet.

The best presidential biographies contain insights into both the personal and the political, says the historian HW Brands. He chooses the best biographies of some of the greatest American presidents.

The Pulitzer prize-winning history professor tells us how the Constitution came to be written and ratified and explains why, after more than 200 years, Americans are still so deeply wedded to it.

Journalist and author Edward Lucas gives an excoriating critique of Putinism and explains how Russia’s amoral present is rooted in a failure to come to terms with its past.

As the Olympics open, David Runciman looks back at the two previous times that the Games have been staged in London and finds that the thrift of today looks modest compared with austerities of the past

The Belle Epoque combined a preoccupation with the noblesse of the old regime with the seeds for modernism, says Oxford history professor Ruth Harris, author of an award-winning book on the Dreyfus affair. She picks the best books on a golden period in France before the outbreak of World War I.

Harvard professor and Pulitzer prize-winning historian Bernard Bailyn recommends reading on three centuries of empire, conflict and slave trading between the Americas, Europe and Africa

Before the era of nation states, the great Levantine cities of Beirut, Alexandria and Smyrna experienced a golden age, as the author of Levant, Philip Mansel, explains

The Russian revolution was the beginning of the modern age, says award-winning author Roland Chambers. He tells us what Solzhenitsyn imagined Lenin was like, and about the children’s author who led a double life as a spy in Bolshevik Russia.

Kenneth W. Mack, the  Lawrence D. Biele Professor of Law at Harvard University, discusses the warring ideals of egalitarianism and exclusion at the heart of US politics and law, from the founding of the nation up to the present day.

The American economy has been driven by waves of technological change and the successful adoption of ideas from elsewhere. The author of Land of Promise tells us how it happened, and what history teaches us about the way ahead

Until the 1970s, Britain was predominantly a working class society, says the historian David Kynaston. He tells us about books that explore how this changed, giving rise to the turbulent Thatcher years.

The former chair of President Obama’s Council of Economic Advisers says we’ve learned that terrible downturns can still occur, but also that the right policy response can make a huge difference to the outcome

It was a bloody conflict that divided Spain and drew in Hitler, Stalin and Mussolini. Later, it inspired great works of art and literature. An eminent historian of the period tells us why it continues to fascinate him

For all its problems, Pakistan is not a failed state, says the academic and writer. He recommends what to read if we’re to grasp the nuances of this complex and potentially explosive nation

In October 1911, China’s last imperial dynasty fell. The legacy of that revolution remains deeply ambiguous in today’s People’s Republic. China scholar Rana Mitter tells us about the country’s tumultuous changes from 1911 to the present day.

There's a lot more to the story of colonists and Native Americans than the tale of the first Thanksgiving taught in school, says history professor Colin Calloway.

The 1930s are hugely underrated as a decade, says the historian. She tells us about the social and design revolutions that made the thirties much more than just a prelude to war

Turkey is rediscovering its Ottoman past, says the British professor living in Ankara. He picks five books for compelling insights into Turkish history.

The veteran journalist, who has lived in India for most of his life, talks about the country’s new-found self-confidence and recommends books to better understand its history and complexities

India’s first-ever consul general to Karachi says Pakistan is not a failed state. He is convinced that its middle class will save it from the Taliban, and that it can engage with India and set aside historic hostilities.

The professor of history at Cambridge asks why Oliver Cromwell remains Britain’s most controversial ruler, and what the morbid story of Cromwell’s head after his death has to say about British history.

The best-selling author says the 19th century Regency era was, apart from the duels and empire-line dresses, much like our own – a time of war and economic uncertainty

From the annexation of Texas to the UN’s Commission on Human Rights, first ladies have played a key role in the history of the United States. Historian Carl Sferrazza Anthony recommends five engaging books about the tumultuous lives of some of the country’s first ladies.

The story and tragedy of the Kennedys is so incredible you don’t need to turn to fiction, says the biographer of Joseph P Kennedy, David Nasaw. He talks us through the Kennedy generations.

The Egyptian author and journalist discusses Egypt’s past and present and the main issues facing the post-revolutionary Arab world

Raja Shehadeh’s choices highlight the suffering endured by the Palestinian people over the last 100 years. But they also celebrate the country’s natural beauty, vibrant culture and multi-textured humanity.