The Discworld series by Terry Pratchett. Not a single BAD book (a couple of "not so good" ones).
Get a copy of "Going Postal" or "Mort" - prepare to laugh, and take a different attitude to the way you see the world.
What is your favorite book/book series?
Black Daggar Brotherhood - J.R. Ward
The Guild Hunters - Nalini Singh
Unbroken - Laura Hillenbrand
Mine are the unwanteds series and the 39 clues series :-)
J.D.Robb's "In Death" series. Futuristic detective stories with great characters, a touch of romance (after all, Robb's other name is Nora Roberts) and scuds of laughter, She has a flair for humour.
Then there's David Baldacci's "Camel Club" septilogy. (I think I just invented that.) Five great yarns about an ageing demi-superhero.
But, really, it's hard to go past Tolkien's great LOTR trilogy. The movies were good. The book was better.
"Who moved m y Cheese "!by Spencer Johnson !