Here is great information for choosing PC components, written by the maintainers of hardwareguys.com
Here is a wide variety of information on how data is recorded on discs. You need to know how data is physically recorded, how it is formatted at the byte level, and practical approaches to recovering after failure. The book is slightly dated, but is still useful.
AutoCAD 2009 & AutoCAD LT 2009 bible / Ellen Finkelstein, Wiley, 2008
Here are 1200 pages on using AutoCAD, with a trial version on DVD.
Eccentric cubicle / Kaden Harris, O’Reilly, 2007
From the cover: “Office accessories from a parallel universe”. This book will be magnetic for anyone who enjoys making a powerful desktop slingshot or mechanical golf ball driver out of discarded, scrap-dealer materials. The book has lots of advice for you in your garage machine shop.