Mechanical Books

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I've been slowly collecting some mechanical reference books for my library, primarily for some creative inspiration, and I was wondering if anyone had any other titles they'd consider useful. I'm particularly interested in any collections of various linkages and/or gear sets.

What I have is:

Illustrated Sourcebook of Mechanical Components, by Parmley
Machine Devices and Components, by Parmley
1800 Mechanical Movements, Devices, and Appliances, by Hiscox
Mechanisms and Mechanical Devices, by Sclater and Chironis
507 Mechanical Movements, by Brown

Any other suggestions are appreciated.