I don't remember where I got this, and it isn't really anything I would normally keep, but since it has Jim Butterfield's name on the cover I'm making an exception.  Check out the pages towards the end of the book, they have some interesting reference material.

Learn how to control and customize your Epson printer. Make it do everything you want it to do. Produce professional, good-looking documents quickly and easily. This complete guide will show you how. And if you're a first-time buyer, l will help you choose the Epson dot-matrix printer that's exactly right for your microcomputer and your kind of work.

Welcome to Info World's Essential Guide to the Commodore 64. This book will help you get the most out of your Commodore 64. Whether you already own a Commodore system or are trying to decide which computer to buy, we think
you'll find this guide essential.

This book will show you how to write computer programs using your Commodore 64, but what is a program, and why do you need one? The simplest answer is that a program tells acomputer to do something, and you need it because without it the machine can do only very simple things.

Joe's 2nd Book for the C64 by Joseph E. Gordon - This book is a collection of tips, reviews and type-in programs from various sources.  I'm not so sure this should be considered a book in the traditional sense because what it covers is so broad and really not in much depth.  It seems more like a diary of things Joe has worked on or played with since his 1st book.  All the same, it has some good information and references some interesting and useful software.

Here's a link to Joe's First Book for the C64

Joe's First Book For The C64 by Joseph Gordon - As quoted by the author:

"I had a Commodore 64 as a kid and had a few books, games, magazines, disk drive, printer and a tape drive. I typed in many programs from the books and magazines and even created my own programs. When my C64 broke, I sold everything. When I heard about the C64 Maxi, I got nostalgic and starting using VICE 3.3, a Commodore 64 emulator. Even though working with my C64 taught me that I didn’t want to be a programmer, I wanted to re-create some of the programs I wrote long ago and share them. This book is the result."

Here is a link to over 150 Commodore related YouTube videos Joe has created.  There are some nice videos on setting up VICE and using GEOS amongst others.

Q-Link Public Domain Software Directory 1990-1991 is a neat listing of all the public domain software available on the Q-Link service back in the days.

If a COMMODORE 64 dies after the warranty expires the owner has the option of finding a local repair shop or sending it off to Commodore.

Another option and the subject of this manual is fixing it yourself. How useful the tips found here will be depends on your electronics experience and resources. Even the most  experienced technician can save a lot of time with repair history on a machine he has not worked on before. On the other extreme, some people may have great difficulty with the simplest repairs. Where you fit will determine how far you want to troubleshoot. This manual will be of use to electronic repair centers by bypassing some of the learning curve that goes with taking on any new line of equipment, in this case the Commodore 64.

The Best of The TORPET was difficult to edit. Not because the material was difficult to understand, or poorly organized, or of poor quality, but simply because there was so much good stuff to choose from and squeeze into 320 pages. I started out with nearly 1500 pages of material and squeezed, squeezed and squeezed.

Link - Program Disk

This book is written as an information guide for those who wish to learn about and experiment with software protection and duplication methods.

Here's a link to the disk that accompanies the book.