There are so many good ones.Planets in Aspect by Pelletier, Planets in Transit by Hand, Planets in Love by Townley,Planets in Composite by Hand.
The Combination of Stellar influences by Reinhold Ebertin - a truly amazing work.
Modern Transits by Lois Rodden - A classic and a must have in every astrologer's library.
Secrets from a Stargazer's Notebook by Debbie Kempton Smith
Chiron by Barbara Hand Clowe
Linda Goodman's books (all of them)
Alive and Well with Uranus by Tierney
Alive and Well with Neptune by Tierney
Alive and Well with Pluto by Tierney
Astrology Karma and Transformation by Arroyo
Sabian Symbols by Marc Edmund Jones
Buddhist Astrology by Shaneman & Angel