THE NEW TIME TRAVELERS by David Toomey

I finished reading THE NEW TIME TRAVELERS by David Toomey. Although published in 2007, the physics of time-travel has not advanced much beyond that of Nahin's book TIME MACHINES. I found Toomey's book to be clearly written, and a good refresher on the subject. He delves into all the pertinent issues including "free-will," "causality violation," "paradoxes," and "quantum weirdness." Research into time-travel seems to be at a standstill pending a working theory of "quantum gravity." The book is an overview of the history of the concept of time-travel in the realm of theoretical physics. It is the most up to date work that I know of, and important for that reason.