T’ai Chi Ch’uan & Meditation by Da Liu. Schocken Books
The T’ai Chi Boxing Chronicle by Kuo Lien-Ying, transl. by Guttmann. North Atlantic Books
Kuo Lien-Ying is the Chinese master who first taught Kuang Ping style taijiquan in the US.
Lost T’ai-Chi Classics from the Late Ch’ing Dynasty by Douglas Wile, SUNY Press.
Historical background of Kuang Ping, Yang, Chen, Wu and Sun styles. Excellent resource for the taijiquan player who wants to know more about the development of taijiquan against the backdrop of the Boxer Rebellion.
The Complete Book of T’ai Chi Ch’uan by Wong Kiew Kit, Element Books.
Definitely complete — covers several styles of t’ai chi ch’uan, with diagrams; useful reference for the taijiquan player.
*note: t’ai chi ch’uan is the old Wade Giles transliteration; taijiquan is the modern Mandarin pinyin spelling. Properly, both are referred to with ch’uan/quan (fist) on the end, but popularly in the west, this gets dropped.