The Psychology of Time Travel

In 1967, four female scientists worked together to build the world's first time machine. But just as they are about to debut their creation, one of them suffers a breakdown, putting the whole project - and future of time travel - in jeopardy. To protect their invention, one member is exiled from the team - erasing her contributions from history.
Behind the excellent time travel idea lies a dark murder mystery. It's intriguing right from the start. The characters are so well drawn. I liked everything about this book.