Codex Magica : By Texe Marrs

Codex Magica: Secret Signs, Mysterious Symbols, and Hidden Codes of the Illuminati

is a 2005 conspiracy theory book written by Texe Marrs. The book's central premise is that the world's most powerful politicians, celebrities, and business leaders are members of a secret society, the Illuminati, and use occult symbols and coded hand signs to communicate and control society. 

Core claims of the book

• Deciphering occult symbols: Marrs claims to expose the hidden meanings behind everyday symbols, arguing they are part of a secret language used by the elite to manipulate and control the masses.
• Photographic "evidence": The book contains over 1,000 photos and illustrations that Marrs presents as evidence. He identifies what he claims are secret hand signals being performed by public figures in these images.
• Illuminati plan: According to the book, by cracking the "Illuminati code," readers can unravel the group's "astonishing plan to control and manipulate" society.
• Conspiracy theory focus: The book is a prominent work in the modern conspiracy theory genre. It portrays the Illuminati as a shadowy realm of secret societies that has been "perplexing researchers and history buffs alike".