I’ve read Hawksmoor and Chatterton (a long time ago, probably when they first came out in paperback): I enjoyed the former, particularly its vivid evocations of 17th/18th century London, but wasn’t so keen on the latter, the details of which I scarcely remember at all.

YES YES YES they are! (sorry, I'm a real fan, I think he's an incredible writer). You'd probably like 'English Music'. And if you haven't read 'London: the biography' you should. Milton in America is also interesting.

I haven't read the Lambs of London and intend to do so soon.

His biography of Thomas More is just wonderful, as well. Don't limit yourself to his fiction.

His biography of Thomas More is just wonderful, as well.

His biography of Blake was fairly readable, but is riddled with inaccuracies, according to the author of The Stranger From Paradise.

I'm a huge fan of his work. Hawksmoor, The Great Fire of London, The Last Testament of Oscar Wilde, and Milton in America are my favourites. London: The Biography is also excellent. He clearly loves his city and, as you say, knows an incredible amount about it. I'd suggest not reading too many in a row, though, as his theme of London as a palimpsest can start to feel repetitive with too much exposure.

Lentrohamsanin, unless I'm missing something, what you link to is a review of 'The Stranger from Paradise' by G.E. Bentley, and the review doesn't mention Ackroyd.

Right. It's actually in the text of The Stranger From Paradise that Bentley takes Ackroyd to task. The review link was just context for what The Stranger From Paradise is.