We're still compiling this list, but the book that has helped us more than any other book is definitely Have Heart by Steve and Sarah Berger. They have a website called Have Heart that they developed after their 19-year-old son, Josiah, went to Heaven as a result of a car accident.
Here is a list of the Christian resources that we've found helpful in our grief. Just click each title to visit the website for each resource:
Have Heart (online support group and a fabulous book)
Healing Hearts (online grief site)
GriefShare (online Christian grief support with local support groups and daily grief emails)
Grief Recovery Books (a list of Christian grief help books)