The novel takes its name from the The Indemnity and Oblivion Act 1660, which honoured the regime’s promise not to inflict reprisals – except for those involved in the death of the king. Whalley was Oliver Cromwell’s cousin and close to the heart of the Commonwealth. Goffe is if anything more fanatical and Whalley’s increased doubts in the face of his son-in-law’s entrenched beliefs form one of the many fascinating subplots. But both were Colonels in the Roundhead Army and both had blood on their hands. Colonel Edward Whalley and his son-in-law, Colonel William Goffe, cross the Atlantic. They are on the run and wanted for the murder of Charles I. Under the provisions of the Act of Oblivion, they have been found guilty in absentia of high treason. It’s disgraceful, but I did enjoy the Chips Channon diaries, the new first volume. My most pleasurable reading experiences are diaries and letters. History unfiltered, not refracted through a historian’s imagination. The Chips Channon diaries bring alive a section of society in the 20s and 30s with great vividness.

I realise now that I was always a novelist earning a living as journalist, rather than a journalist who one day happened to write a novel. So I wouldn’t want to be a political editor again, although I’m grateful for the experience and I draw on it all the time, whether the novel is set in ancient Rome or 19th-century France. This article was amended on 30 August 2022. The Act of Oblivion was passed in 1660, not 1652 as an earlier version said. Harris has dealt with religion and religious conflict before. Successfully in Conclave, where the election of a new pope becomes a political nailbiter. Less so in The Second Sleep, which I felt never quite worked out how to bring its ideas together in a coherent whole. I was reminded of the TV series and film The Fugitive. Naylor is a scary and unremitting antagonist. Prepared to go to any lengths and yet always believable. And as with all good antagonists, we can see exactly why he is so driven in his turn.

As Nayler arrives in America, the pace of the novel increases, the sense of an inevitable meeting propelling the narrative forward. The chapters, paragraphs, even the sentences become shorter as the colonels seek to evade their monomaniacal pursuer. As always with Harris, there’s a delicious sense of being in the hands of a master, of watching as the pieces of the narrative puzzle fall into place. Act of Oblivion is a fine novel about a divided nation, about invisible wounds that heal slower than visible ones. Like Ishiguro’s The Buried Giant , it feels like an important book for our particular historical moment, one that shows the power of forgiveness and the intolerable burden of long-held grudges. I would hardly be the first person to point out the dramatic parallels with our own age. Polarised religious sects. Fierce political debates spilling over into violence. A sense that anything was possible, for good or bad. The year is 1660. Two men flee Britain for their lives. Edward Whalley and his son-in-law William Goffe were among those who signed Charles I’s death warrant and now Charles II wants revenge. That we do care is in part down to the extreme danger they face, and much due to Harris’s skill. Truth or legend?

It’s particularly pressing when the story relates to events that took place around three hundred and fifty years ago, to people of whom we are unlikely to have heard. Have a character whom you’re interested in, and in whom your reader is interested, and have something interesting happen to them in this world you’ve created. That’s how you start the novel. Now, the events I’m interested in are political events and the universality of political impulses, from Cicero’s Rome to 19th-century France to Russia, Germany, wherever – the same quest for power is there. Most of my characters are peripheral – a ghost writer, a secretary – they are observers of power. It’s disgraceful, but I did enjoy the Chips Channon diaries, the new first volume He took a while to reply. By the time he spoke the men had gone inside. He said quietly, 'They killed the King.' Whalley and Goffe could also have been difficult characters to care about. They are/were committed Puritans with an extreme view of religion that would put many modern fundamentalists to shame. Indeed, one of the fascinating parallels with our century is that all three are convinced that God’s ends justify any means. It feels churlish to say this. It’s not a big thing, but I suspect it comes from Harris’s strict adherence to the facts as we know them. He is careful not to invent anything that could not be deduced, but that leaves him with an episodic story.Colonel Edward Whalley and his son-in-law, Colonel William Goffe, cross the Atlantic. Having been found guilty of high treason for the murder of Charles the I, they are wanted and on the run. A reward hangs over their heads - for their capture, dead or alive. His journal allows us to see into his uncertainties and vulnerabilities, sides of his character which are crucial to ensuring that we stay engaged. However, true stories rarely provide the writer with a neat structure, and here I feel the middle sags a bit.

Do remember, though, that this is fiction, told from Cicero’s point of view, and (for example) Julius Caesar may not have been quite as bad as he is portrayed by Robert Harris. According to Classics teacher Olly Murphy, in his interview on the best Classics books for teenagers, Harris “does put in things which now we might say are controversial or we’re not sure about but, for the most part, his portrayal of what it would have been like for a senator going about his daily business is absolutely spot on.” One of the challenges of writing about this period is that the intricacies of religious faith and faction can seem distant and abstruse to a modern audience. Goffe is a religious man – he had wanted to become a minister before the war intervened – but Harris doesn’t allow himself to become hung up on the niceties of Christian doctrine. Rather, he makes a broader point about the position of the colonels in New England: the simplicity of their faith and anti-monarchical feeling finds a natural home among the dissenters and Puritans of the New World. The impulses that would animate the revolution a hundred years hence were all there in the English civil war. This does not, alas, mean that the men have an easy time of it in Massachusetts. Act of Oblivion is an epic journey across continents, and a chase like no other. It is the thrilling new novel by Robert Harris. I’m sitting here with biography. Literary biography and history are in the hall. Military history and Nazis are on the landing outside the bedroom – a rather sinister wall, it has to be said, but they paid for the house. Fiction in the drawing room and in our bedroom. There’s no point in having an awful lot of books if you can’t more or less find something when you want to read it, so they’re reasonably alphabetic in those sections.But these are small cavils in a chase story that generally grips from start to finish. And yes, I did care. Read more And while the author has invented him, he has done this with good reason. As Harris says, if there was a pursuit, there must have been a pursuer. It’s just that no records of who he was have survived. Vulnerabilities It’s a tribute to Harris’s skill and research that Naylor is virtually the only invented character – he tells us this at the very start – and yet he rings as true as the others. The publishers have provided a list of personae and a map of New England, but I rarely needed either. I found it fascinating to join a journey through famous towns and cities as they must have been in their very early years. From a nascent Boston to the future New York and many townships in between. If you like history, Robert Harris is one of the best historical novelists around. Pompeii (about the eruption of Vesuvius), An Officer and A Spy (about the Dreyfus Affair), even Archangel (set in Soviet Russia) are fabulous thrillers that bring the past alive. But when it came to Marcus Tullius Cicero, the Roman statesman, Harris really went to town and wrote an entire trilogy about him: Imperium, Lustrum and Dictator. The reason Harris was able to do this with a degree of accuracy is because Cicero wrote so much—indeed we have Cicero to thank for large chunks of our knowledge of the Latin language. The trilogy is just a wonderful evocation of what it was like to be an ambitious person in the days of the late Roman republic, as it fell apart and became an empire.

Robert Harris (no relation) has an impressive CV. His historical thrillers stretch from Imperial Rome ( Pompeii and Imperium) to 800 years in the future ( Second Sleep). In parallel strands, we follow Whalley and Goffe as they criss-cross New England, trying desperately to remain hidden, and their dedicated pursuer Richard Naylor.The wounds of the brutal civil war are still visible on men’s bodies”: the execution of Charles I in Whitehall, London, 1649. Illustration: Hulton Archive/Getty Images