Project Dibbuk is a book appearing in Deus Ex. It describes the project that resulted in the creation of the SH-187 stealth helicopter. Certain copies of Project Dibbuk contain a short overiew of the project while some of them provide more detail on the specifications and operation of the helicopters. There are multiple copies of the book found throughout the game. For example, it can be found in UNATCO HQ and the MJ12 lab on Liberty Island, and in the MJ12 Helibase in Hong Kong.