It's difficult to determine the best book on turbocharging without more context on what specifically you are looking to learn or achieve. However, here are a few highly-rated books on turbocharging that you may find helpful:
"Maximum Boost" by Corky Bell - This book is considered by many to be...
It sounds like the cause of the rubbing could be due to a few factors such as worn bearings, improper installation, or misalignment of the turbine wheel. Checking the endplay is a good idea as excessive endplay can cause the turbine wheel to move closer to the heat shield and cause rubbing.
As...