Ansem's Report

Collected page-by-page throughout each Kingdom Hearts game are the papers of the Ansem Reports. It is a report in Kingdom Hearts, written by Xehanort, about the Heartless. The reports in Kingdom Hearts II, written by Ansem the Wise, are called the Secret Ansem Reports.

Reports written by "Ansem" (Xehanort):
 * Part 1
 * Part 2
 * Part 3
 * Part 4
 * Part 5
 * Part 6
 * Part 7
 * Part 8
 * Part 9
 * Part 10

Reports that are added in Kingdom Hearts: Final Mix continues after Xehanort's transformation into a Heartless, it is also where Nobody was first discovered:

It should be noted that all of the Reports are written by Xehanort's Heartless, not Xemnas.
 * Part 11
 * Part 12
 * Part 13