I've got a couple of used text books that are up for sale.
Covers computer science topics - programming & network engineering.
Component-Based Network System Engineering (Norris, Davis, Pengelly)
ISBN 1580530087, Published 2000
Asking: $25 (hardcover with no wear)
Introduction to Assembly Language Programming (Dandamudi S.)
ISBN 0387985301, Published 1998 (1st edition)
Asking: $10 (hardcover with some wear along edges)
Located in Pickering / East Scarborough, but other arrangements may be possible.