I would like to recommend a book, The Music Instinct, by Philip Ball, who is a multiply prize-winning science writer writing for non-scientists, but usually most of his readers are scientists who greatly benefit from his insight and clarity of presentation. This relatively new book is also written for non-musicians, but I expect it to be read mainly by musicians and music lovers with some musical education. Starting with a history of chiefly western music and the origin of scales and tonalities he tries to explain what music really is and why it has the effects on us that we all know about. Take it on your summer holiday......;}