These are books I have read, enjoyed and recommend.
Russell Targ, Harold Puthoff
Mind-Reach: Scientists Look at Psychic Abilities (Studies in Consciousness)
Describes the early days at SRI.
Limitless Mind: A Guide to Remote Viewing and Transformation of Consciousness
Opening to the Infinite
Schwartz on remote viewing.
The Secret Vaults of Time: Psychic Archaeology and the Quest for Man's Beginnings
Fascinating look at the use of various psychic abilities used in conjunction with Archaeology.
The Alexandria Project Schwartz's own project using remote viewing.
Remote Viewers: The Secret History of America's Psychic Spies
Good overview of the US government's history with remote viewing from SRI (Puthoff, Targ, Swann, Price) and the creation of the protocols, through to the Army units and eventual disbandment.
Reading the Enemy's Mind: Inside Star Gate: America's Psychic Espionage Program
Also highly recommended; Daz Smith's Eight Martinis Remote Viewing magazine, it’s free online, a printed version is available also.