I concur with Cazmo 2911's comments about what books mean to you and where you are in your life.
Intriguingly, despite the questioner asking for 1-3 books for recommendation (s)he gives several... and quite rightly because there are so many excellent books. So here goes and not in any particular order:
1. Chris Wooding - The Haunting of Alaizable Cray
2. Chris Wooding - The Braided Path trilogy
Don't be put off by the lousy cover on the Scholastic version of Alaizable - a teen fantasy book but absolutely stunning.
3 and 4 Robin Hobb - The Farseer Trilogy and
The Tawny Man trilogy - which are really a 6-book series.
5 Robin Jarvis - Tales from the Wyrd Museum trilogy
6 Garth Nix - The Abhorsen trilogy
7 Eoin Colfer - The Supernaturist
8 Eoin Colfer - The Wish List
9 Greg Keyes - The Kingdoms of Thorn and Bone trilogy
10 Greg Keyes - The Age of Unreason quartet (to be completed)
11 Christopher Paolini - The Inheritance trilogy (to be completed)
12 Robert Joran - Wheel of Time series (to be completed)
13 K J Parker - The Engineer trilogy (to be completed)
14 Trudi Canavan - The Black Magician trilogy
15 Trudi Canavan - The Age of the Five trilogy
16 Margaret Mahy - Maddigan's Fantasia
17 Philip Pullman - Dark Materials trilogy
18 Terry Pratchett - soooo many! but Going Postal
19-21 Terry Pratchett - The Wee Free Men; A Hat Full of Sky and Wintersmith
22 Terry Pratchett - The Carpet People
23 Jonathan Stroud - The Bartimaeus trilogy...
and it would be so easy to go on and on and on... lol!