Many of us live in democracies and believe in government transparency, but the truth is our leaders have considerable scope to engage in secret operations overseas. Rory Cormac talks us through five books on ‘covert action,’ and some of the countries that have embraced it as a policy tool.

Ancient Greece’s legacy can be seen all around us, including in our political system — but many of us don’t know that much about it. Fortunately, we have someone who has devoted his life to studying this remote time and place to give us a reading list. Chris Pelling, Emeritus Regius Professor of Greek at Oxford, recommends his top five books on Ancient Greece.

It’s no longer enough for military history to be just about battles told from the the winning side. One of the great military historians of our time, Hew Strachan, talks us through what makes a great military 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.

We often assume the Victorians had puritanical attitudes to sex, but this was far from the reality. From familiar classics to neglected gems, Claire Jarvis—Stanford academic and author of Exquisite Masochism: Sex, Marriage and the Novel Form—selects the best books on sex in Victorian literature.

The EU started life as a small trading bloc but now spans 28 (soon to be 27) countries with half a billion people. What can be done to help its institutions catch up with the new reality? Giles Merritt, author of Slippery Slope: Brexit and Europe’s Troubled Future, has some ideas.

Geologist Jan Zalasiewicz tells us about the danger posed to oceans by the Anthropocene – and how we can work together to protect them

To brand is human, says practitioner and professor Robert Jones. He recommends the five best books on branding.

George Eliot is all but synonymous with Victorian realism; for D H Lawrence, she was the first novelist to start ‘putting all the action inside.’ Here, Philip Davis, author of The Transferred Life of George Eliot, selects the best books by or about one of the greatest novelists of all time: ‘If you want to read literature that sets out to create a holding ground for raw human material—for human struggles, difficulties, and celebrations—read George Eliot’

Zombies have returned with a vengeance in recent years, the secret to their undying popularity lying in their ability to embody many different kinds of menace, from social unrest to pandemics, financial insecurity to international terrorism. Greg Garrett, author of Living with the Living Dead, recommends five books to help you prepare for the zombie apocalypse

Old age. We all hope to reach it, but there are big differences between a ‘good’ old age and one beset by dementia or Alzheimer’s. Neuroscientist and science writer, Kathleen Taylor, talks us through the latest science on ageing and the literary works that can give us a clearer picture of what it’s all about.

What is the nature of human existence in the world? What should philosophy be concerned with as a discipline? Philosopher Simon Critchley introduces us to the landscape of continental philosophy.

Half a millennium ago this month, Martin Luther, an unknown friar in an obscure town in eastern Germany may or may not have posted a list of complaints to the door of his local church. His actions would lead to what was later called ‘the Reformation’ — a grisly period in European history that nonetheless paved the way for a more tolerant and pluralistic society. Peter Marshall, one of the period’s leading scholars, talks us through the best books on the Reformation.

‘It’s a long time since ogres have seemed so absolutely real,’ says Marina Warner, author and long-time scholar of fairy tales. Which makes now as good a time as any to immerse ourselves in the twisted truths of the fairy tale realm, with Warner’s selection of the best books of, or about, other-worldly tales of mischief and subversion, dreams and laughter, ‘hope against hope’

Communicating physics is difficult, partly because the underlying ideas can be hard to grasp, even for experts. Popular science writer, Jim Baggott, talks us through some of his favourite physics books.

Oscar Wilde cultivated an image of himself as an idle genius, dashing off masterpieces with a lazy brilliance. But below the glittering linguistic surface of his works, suggests Sos Eltis, lies an anarchic politics and a phenomenal analysis of power.

Humanist ideas are not a recent phenomenon, but have been around for millennia, says Andrew Copson, chief executive of Humanists UK. He explains why it’s worth making a positive choice to be a humanist and recommends a great humanist reading list.

Every generation has its own Leonardo, and for many he remains a man of mystery. Martin Kemp, Emeritus Professor in Art History at Oxford and the author of the recently published Mona Lisa: The People and the Painting, helps us identify the non-mythical Leonardo. What might Leonardo be doing were he alive today, in our own digital age?

Arabic philosophy was hugely influential during the Islamic Golden Age; at one point, the Persian polymath Avicenna’s influence outstripped that of Aristotle. But a strong tradition has continued in the centuries since, explains Professor Peter Adamson, as he selects five of the best books 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.

Heroes are universal to human culture and, in Christian culture, they manifested themselves as saints. Historian Simon Yarrow recommends the best books to understand the saints, from their widespread appearance in late antiquity to their continuing influence in modern America.

Texts about military strategy take us back into the mists of time but what it is, and what the nature of war is, remains hotly debated. Antulio Echevarria II of the US Army War College talks us through key books, both old and new, on military strategy.

Churchill hailed the Allied victory at the Battle of El Alamein as “the end of the beginning” for Hitler in World War II. But in that very same speech, he downplayed its significance. Historian Simon Ball separates clichés from facts and chooses the best of the vast number of books written about El Alamein, the Desert War and World War II in general.

The Vikings discovered America and traded slaves in Baghdad. They sometimes buried their dead in ships, but probably did not burn them. And they did not wear horned helmets. Historian Eleanor Barraclough separates myth from reality and recommends books on the medieval Norse pillagers who have fascinated everyone from Hollywood to Hitler.

The novel is no longer the king of the narrative arts, says the writer and academic Robert Eaglestone. Yet literature has never been more interesting. Here he discusses five excellent novels that exemplify current trends in contemporary fiction.

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.

After a tumultuous year in politics, ‘populism’ is on everybody’s lips. But what is it? Is it good or bad for democracy? How is it that populist movements often have superrich leaders? Political scientist and longtime populism observer Cas Mudde recommends the best books on populism.

He was the most popular novelist of the Victorian era, a convivial family man who always championed the underdog. But he also harboured dark secrets that only came out after his death. Jenny Hartley recommends the best books by and about the phenomenon that was and is Charles Dickens.

The term ‘eugenics’ elicits queasiness amongst those who associate it with the Nazis. But Winston Churchill, George Bernard Shaw and Margaret Sanger were among its many proponents in the interwar period. Why? Philippa Levine, professor of history at the University of Texas, explains.

It’s a dictionary that seeks to document any word that exists—or ever existed—in the English language and track its evolution over time. Lexicographer Peter Gilliver chooses books to help understand the enormous undertaking that is the Oxford English Dictionary.

When addressing the really fundamental questions in science, researchers must assume that there is an objective reality to describe. But the nature of that reality may be more subtle, allowing space for the existence of God, says Andrew Briggs, professor of nanomaterials at Oxford University.

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.