Part 1 - Informal look at the Restoration suite - Samplitude - YouTube
An informal look at the workings of Samplitude's Spectral cleaner, De-noiser, De-clicker, and De-hisser
Home Recording Studio Build It Like The Pros
(Second Edition) by Rod Gervais . This book teaches you how to do all these things, from building a professional home studio to saving thousands of dollars in the process.