Acorn/BBC - Pan Personal Computer - Sixty Programs for the Electron

Practical Spectrum Machine Code Programming, Steve Webb

Super Charge Your Spectrum, David Webb

The Complete Spectrum ROM Disassembly, Dr Ian Logan & Dr Frank O'Hara

Pan Personal Computer, Sixty Programs for the Commodore 64

Spectrum Machine Language for the Absolute Beginner, William Tang

Spectrum Programmes, Volume 1, Nick Hampshire

Special Agent, Sinclair Spectrum 48K, Heinemann - Game