Commodore 64 Computing, by Ian Sinclair.
Troubleshooting and Repairing your Commodore 64
Hardware-Basteleien zum c64/c128 (German), thanks to Jan Charington Klein.
Der Welt Der C64 (German)
Introduction to Oxford Pascal has been replaced with its correct titled manual. The old one was a photocopy and lacking pages.
CBM 64 Norsk PRogrammeringskurs – Datakurs I (Norwegian).
The Power of Calc Result for the Commodore 64.
The Commodore 64 Games Book, thanks to Patrick Ipsen.