Race is a real and powerful force and one he has spent his adult life trying to understand, says Anglo-Nigerian historian, writer and producer, David Olusoga. He talks us through five books on the tragedy of slavery—from the horrors of the gulag, to the plantations of Virginia, to the Islamic slave trade.

Italian unification was one of the great political dramas of 19th century Europe, transforming a patchwork of territories speaking different languages into the nation-state of Italy. Here, historian Carlotta Ferrara degli Uberti discusses the people and ideas that brought it about and how its disputed legacy continues to impact Italy today.

The Weimar Republic was not doomed to fail, says the historian Robert Gerwarth; it was, in many ways, popularly rooted and successful, and its artistic achievements remain influential to this day. Here he selects five books that illustrate the rich cultural life of the Weimar Republic, its pioneering modernism and the febrile political atmosphere that gripped it in the wake of the Great Depression.

In the late 19th and early 20th century, Vienna had a vibrant intellectual and cultural life, embraced and at times led by key figures in its large Jewish community. All that would disappear with the rise of anti-Semitism and the Anschluss. Many Jews fled or committed suicide. Others were deported to concentration camps. After the war some went back, but Vienna would never be the same. Here Brigid Grauman, whose father's family were assimilated Jews from Vienna, recommends books that evoke that poignant, tragic period that ended with World War II.

Few people have had their ideas reinvented as many times as the German intellectual and political activist, Karl Marx. Professor of political theory, Terrell Carver, takes us through the most influential books, in English, about Marx, Marxism and his friend, publicist and financial backer, Friedrich Engels.

The 19th century opium war marked the clash of the world’s great empires of the age – Britain and China. Historian Julia Lovell says its legacy of Chinese humiliation is still felt keenly in Beijing.

At the beginning of the 1800s, Germany was a collection of independent states. By the end, it had been unified under Prussian political leadership into one of the world's great powers. Here, Richard Evans, Regius Professor Emeritus of History at the University of Cambridge and Provost of Gresham College in the City of London, chooses five books on 19th century Germany that illustrate how that process unfolded and what the political, economic and social consequences of it were—intended and otherwise.

The explorer and author of Into the Silence, Wade Davis, tells us that the consequences of the Great War were much more than merely political. He says the war had a noticeable impact on exploration, arts and literature, and modernity itself.

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.

History books often focus on big political or economic events, wars and leaders. But there's much to learn from studying the way people lived, and what made the Victorian age both like and unlike our own, as Judith Flanders explains.