A book worth having in paper form so you can go through it go through the book systematically and ponder over the lessons
The HTML is great for reference, and the typed-in program listings for double-checking your work (if you type in the programs, you will understand it better)
- Google Search buy from a bookstore or eBay or
(Interface Publishing, paperback 186 pages ISBN 0907563236)
USA edition with yellow or orange cover has a blurb "use this book with your Timex Sinclair 1000 Computer!" pasted over a photo of the ZX81
(a Reward Book, Reston Publishing, hardcover 180 pages, ISBN:9780835942614, 0835942619)