Humour is a tricky thing. I get nervous when a book is advertised as 'hilarious' or 'laugh out loud funny' because I've been fooled a bit by this. It could just be my humour doesn't match the blurber, and my list may not tickle your funny bone. But these are the books that I remember as funny. I'll be looking for other lists that somewhat match my list to find some new funny books. Check out That Artsy Reader Girl for future topics and other lists.
Not David Sedaris or Augusten Burroughs
Running With Scissors was particularly jarring as a 'funny' book. I did not find this book funny at all. At all. And I've read a few Sedaris and I guess I don't get them.
I left off the funny ladies of Tina Fey, Mindy Kaling, and Amy Poehler and I did find their memoirs funny, but maybe not laugh out loud.