Gerald James Toomer (born 23 November 1934) is a historian of astronomy and mathematics who has written numerous books and papers on ancient Greek and medieval Islamic astronomy. In particular, he translated Ptolemy's Almagest into English.
Diocles: On burning mirrors. The Arabic translation of the lost greek original. ed., with English translation and commentary by G. J. Toomer. Springer, Berlin, Heidelberg, New York 1976 (Sources in the history of mathematics and physical sciences, 1). ISBN3-540-07478-3.
Apollonius: Conics, books V to VII. The Arabic translation of the lost Greek original in the version of the Banū Mūsā. In two volumes. Ed. with transl. and commentary by G. J. Toomer. Springer, New York, Berlin, Heidelberg, Springer (Sources in the history of mathematics and physical sciences, 9). ISBN3-540-97216-1.
Hipparchus and Babylonian Astronomy. In: Erle Leichty, Maria de J. Ellis, Pamel Gerardi: A Scientific Humanist: Studies in Memory of Abraham Sachs. Philadelphia: Occasional Publications of the Samuel Noah Kramer Fund, 9, 1988.
Eastern Wisdom and Learning. The study of Arabic in 17th century England. Oxford University Press 1996.
John Selden. A life in scholarship. Oxford University Press, 2009.