If the plot is pretty risible, some of the characterisation is excellent and the main reason to buy the book. There are few shrewder observers of Westminster and Fleet St than Marr, and his deft touch is apparent throughout. Covering up the death of a prime minister would only be possible if the press were lazy and incurious, and Marr has fun pinpointing the myriad ways in which, because of the 24-hour news cycle, even stories that should stink to high heaven get recycled unchecked.
Minor character after minor character comes to life, from arch-fixer Alois Haydn, silky-tongued friend to the great and good, to Amanda Andrews, the prime minister's formidable gatekeeper, a wheedling manipulator who refers to the king as "Kingy".
Best of all, in some ways, is Marr's inch-perfect portrait of a veteran newspaper editor Ken Cooper, who can hardly utter a sentence without deploying the f-word, dreads meetings with "marketing department weasels" and "circulation ferrets" but still has the nose for a story of an old-style Fleet St news hound.
There is no shortage of private jokes, some of them mildly amusing. Ian Hislop is sighted in the window of a Soho cafe, eating a large cream bun. Fraser Nelson, the Scottish editor of the Spectator, is reinvented as Nelson Fraser, a kilt-wearing Downing St press secretary. The historian Dominic Sandbrook is teased for writing an 800-page history of Britain from 1982 to 1983 which languishes unread in the London Library.
Marr even makes a bold bid to scoop the Literary Review's annual Bad Sex Award with a hilariously gauche passage: "And the sex worked; they bucked like deer and squirmed like eels. And, after that, vice versa."
Marr obviously had fun writing the novel and communicates some of that fun to his readers, but coming from such a distinguished source, it feels like a rather feeble effort.
Head of State
by Andrew Marr
(Fourth Estate $39.99)