http://www.amazon.com/Garbage-Collection-Handbook-Management-Algorithms/dp/1420082795/ref=sr_1_1?s=books&ie=UTF8&qid=1317790242&sr=1-1I heard it's good.
Narihiro Nakamura (a.k.a author of japanese GC book) said "This is great book!".
I want to read this book if time permits. Masahiro