One candidate is The Story of Psychology by Morton Hunt. There is a lot to recommend this book, first and foremost that it is a gracefully written narrative, not a textbook. This is important because Hunt tells his stories well and makes them meaningful, and homo sapiens remember meaningful stories a lot better than they do lists of "key terms."
I haven't read the "revised and updated" 2nd edition (2007), but I don't suppose it is terribly different from the 1993 edition I own (see cover below). Hunt will have had to grapple with behavioral genetics (which wasn't even a topic of consideration back in the 90s). In any case, I would strongly recommend any psychology major (or other interested person) to purchase and read this book (and several chapters more than once) as early as possible in his or her academic career. I cannot guarantee that it will help, but it is very unlikely that it will hurt.