So, a few more (in no particular order):
The Wolves of Willoughby Chase by Joan Aiken is a good children's AH book - though of course if a child doesn't know OTL, he/she may not realise that it
is AH! (I read it when I was about 7 or 8 and got all confused because there were references to things which didn't match what I knew of history!)
It's set in the reign of
James VIII/III (who in OTL was the 'Old Pretender' after
James VII/II was ousted).
The Years of Rice and Salt by Kim Stanley Robinson is an interesting one. It's not a bad read, but a bit on the implausible side, starting with the PoD (the Black Death kills 99% of the European population). It focuses on just a few characters as they are reincarnated at various stages of ATL history - and seem to be at the centre of major events every time. The other problem is that there's a variation on a butterfly net in place. Inventions/discoveries happen at about the same dates as OTL, etc, with just the locations/names changed. But, as I say, it's quite a good read.
For a PoD
much further back, there's
West of Eden / Winter in Eden / Return to Eden by Harry Harrison. The Cretaceous–Paleogene (or -Tertiary) extinction event didn't happen, so the dinosaurs weren't wiped out and evolved into intelligent reptiles - but there are human-analogues (not quite human, but close enough) too.
Harry Turtledove's already been mentioned in this thread, but I don't think
The Two Georges, which he co-wrote with Richard Dreyfuss, has been. It's a detective/adventure story set in modern times, but in an ATL where the American colonies are still in the British Empire. The actual PoD is kind of skimmed over, but the ATL world is quite internally consistent.
Finally, there's
What If? (subtitled 'The World's Foremost Military Historians Imagine What Might Have Been') and its sequels
What If? 2 ('More What If?: Eminent Historians Imagine What Might Have Been') and W
hat Ifs? of American History. They're collections of essays investigating some well-known and some less well-known PoDs. Personally I found the first to be better overall than the second (I haven't read the third), but that might just be me.
Okay, I'm nearly late for dinner, so that'll do for now!