Currently re-reading "Martin the Warrior", a Redwall novel.
"Watership Down" will remain my favorite book of all time, but the Redwall series has come awfully close.
My favorites in the Redwall series:
1. Taggerung
2. Rakkety Tam
3. The Legend of Luke
4. Martin the Warrior
5. Redwall
6. Mattimeo
7. Triss
About the ones I don't like... well, Loamhedge is almost universally considered the worst of the Redwall bunch. I have also despised three other Redwall novels that many people like: The Long Patrol, The Outcast of Redwall, and Mossflower.
For favorite book based on a true story, without a doubt Alex Kotlowitz's "There Are No Children Here", for its portrayal of "the other America" where the Rivers family is stuck in the poor, violent neighborhood of the Henry Horner projects. Very powerful story, and the movie did a great job following the book (geez, it even had Oprah in it). Of course, now I can't hear "Henry Horner" without thinking of "Danger, Will Robinson! Danger!"