The Treason of Isengard

First published in the United Kingdom on 7 September 1989.

Descriptive Bibliography
A27
Abbreviated
Treason Hammond & Anderson

1991 Hardback Edition

HarperCollins
First: 1
Last: 2

2024 Centenary Boxed Edition

HarperCollins
Cover illustration by John Howe
First year: 2024
1
Last known: 1

1992 Paperback Edition

Grafton
Cover illustration by Roger Garland
1 (1992)

1993 Paperback Edition

HarperCollins
Cover illustration by Roger Garland
1 (1993)
Cover illustration by John Howe
First: 2
Last known: 6

2002 Paperback Edition

HarperCollins
Cover illustration by John Howe
First: 1
7
9
10
Last known: 10

2015 Paperback Edition

HarperCollins
Cover illustration by John Howe
updated
Cover image for 2015 Paperback Edition
First year: 2024
32
Last known: 32