ZX81 Books Starting with B

BASIC Basics for the Timex Sinclair 1500/1000 BASIC Basics for the Timex Sinclair 1500/1000
Basics of Timex Sinclair 1500/1000 BASIC Basics of Timex Sinclair 1500/1000 BASIC
Better Programming for Your Spectrum and ZX81 Better Programming for Your Spectrum and ZX81
Byteing Deeper into your ZX81 Byteing Deeper into your ZX81