Good Roman engineering book?

[richsc]

I was very unexpectedly given a present of Goldworthy's Cannae by a retired Army engineer, and wanted by way of thanks to send a good book on Roman and Roman military engineering. What have you folks read that you would recommend? <p>Richard Campbell, Legio XX.
http://www.geocities.com/richsc53/studies/ </p><i></i>

[Praefectusclassis]

J.G. Landels, Engineering in the Ancient World (3rd ed. London 1997), ISBN 0-09-477280-0. Contains a bit about catapults too. <p>Greets<BR>
<BR>
Jasper</p><i></i>

[Anonymous]

Blast Power and Ballistics - Concepts of force and energy in the Ancient World.<br>
<br>
By Jack Lindsay. Pub. by Frederick Muller Limited.<br>
<br>
I don't know if it's still in print, but it's pretty comprehensive.<br>
<br>
Conn Iggulden <p></p><i></i>