Speaker of the Dead (Book)

From Orson Scott Card Wiki

This book forms the basis of a quasi religion based around acurately presenting the lives of people following their death. Written by Ender Wiggin, his authorship of the book is not generally known. It consists of two parts, The Hive Queen and The Hegemon. The Hive Queen details the life experiences of the Buggers based on a cocoon that Ender finds on the first humany colony world. The Hegemon tells the life of Peter Wiggin.