The BBC Micro ToolBox
Using Floppy Discs with the BBC Microcomputer - Cumana
Various BBC Manuals / Books
VIEW Printer Driver ROM User Manual - Watford Electronics
Wapping Editor Desk Top Publishing manual.
WordWise Plus reference manual - Computer Concepts
Not manuals but a selection of BEEBUG magazines. These were well made and had lots of useful
information, tips and programming advice for the 8bit range. The selection even includes the
last ever edition with a good round-up of all the milestones of the Acorn 8bit series machines.