Aryeh Kaplan was a noted American Orthodox rabbi and author, who had a background in both physics and Judaism. He is widely viewed as a prolific and original teacher; his work ranged from studies of the Torah, Talmud and works of mysticism to outreach and philosophy. Wikipedia
24.99 Aryeh Kaplan Anthology I A collection of illuminating expositions on Jewish thought and practice. www.milechai.com/product2/rabbi_aryeh_kaplan.htm
TZITZITH---A THREAD OF LIGHT Rabbi Aryeh Kaplan delves deeply into the mystery of the commandment of Tzitzith to reveal the link between Tzitzith and the ability of man to overcome sin and reach towards G-d. www.ou.org/publications/kaplan.html
The definitive Wikipedia entry for Aryeh Kaplan. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Aryeh_Kaplan