This book is published by Interface Publications and written by the Master-over-all-computer-books, Tim Hartnell. The book claims to provide you with a program which will turn your ZX Spectrum into a Logo-based machine.

For those of you not in the know, Logo is a graphics programming language. It was in invented for the purpose of introducing children to computers, and allows an imaginary turtle to be controlled as it moves around the screen to produce various designs and pictures. The Logo program in the book conforms to the Logo Computer Systems Inc vocabulary. This enables the experienced user to enter the world of Logo and one that is compatible with other systems.

The program is well written and is listed in two versions - with and without the REM statements. This is an excellent idea, not only to fill the book up with a few extra pages (!) but also as the total novice to computing only wants to type in the necessary lines and not bother with pointless keying in. For the more experienced programmer, the REMs are very well detailed and give an excellent view of the program's action.

The book is written in a friendly, easy-to-understand way. From the introduction, right through to the many examples, the reader is taken at a steady pace through the learning process, starting with the basics of the language and then progressing, so that by the end of the book an in-depth knowledge of Logo can be achieved.

Included in the book are numerous Logo examples, from a six-sided figure (called a sexygon by Tim Hartnell) to lots of tiny Sir Clive's, holding hands in a circle.

The book is a bargain at £2.99, even for the experienced reader who finds Tim's teaching a bit simple, as the Logo emulation is very good. My only grumble is the speed at which Logo runs, but this can only be blamed on Sinclair, and not the author.