Here are some more of my favorite books about reincarnation and past lives.

Many Lives, Many Masters:  The True Story of a Prominent Psychiatrist, His Young Patient, and the Past Life Therapy That Changed Both Their Lives by Dr. Brian L. Weiss. 

Life Before Life:  Children's Memories of Previous Lives by Jim B. Tucker

Memories of Heaven:  Children's Astounding Recollections of the Time Before They Came to Earth by Dr. Wayne W. Dyer and Dee Garnes.