Editions of Serpent (Numa Files)

Paperback, 480 pages

Published Sept. 2, 2002 by Pocket Books.

Paperback, 480 pages

Published Sept. 6, 1999 by Simon & Schuster Ltd.

Paperback, 480 pages

Published July 17, 2000 by Pocket Books.

unknown binding, 470 pages

English language

Published May 1, 2000 by Turtleback Books Distributed by Demco Media.

audio cassette

Published Oct. 4, 1999 by Simon & Schuster Audio.

English language

Published Sept. 1, 2000 by Tandem Library.