Rosemary Drysdale has written a well thought out book. This book is aimed at intermediate knitters and above but if you can knit, purl, cast on & off, pick up stitches and read a pattern then you will be able to do entrelac.
The book is split into three main sections. Section one is a basic how to of entrelac knitting. Section two is a pattern library of things that you can do to the entrelac squares - lace, cables etc. This section is fantastic for starting to design your own entrelac items and something I haven't seen in other books about this technique. Section three is a variety of patterns to show off entrelac from a long waistcoat, shawl and bags.
This book may have been published in the US so some of the terms may be unfamiliar, but metric needle sizes and tension (gauge) are given so that yarn substitution looks straight forward. But this technique lends itself to using up stash yarn anyway!
Great addition to my knitting library