There's a great book by Suzanne White that explains each of the 144 combinations in great detail (4-5 pages each) - The New Astrology. It's remarkably accurate for matches and mismatches of personality aspects for close friends I looked up. I was not a big believer in astrology until I discovered this book. It would have saved me years of aggravation if I had come across it two or three girlfriends earlier... Read reviews. You can usually find it used in softcover for around $6.