I have been knitting for years and I have a lot of knitting books. This is by far the best for starting with the basics (even great cast on and cast off techniques depending on the type of stitch you are knitting - which is a revelation to me) and then working through to more complicated stitch techniques, using more than one colour, finishing techniques, crochet for knitting etc. It is clear and concise and has lots of photos and illustrations. It even shows you how to alter knitted garments, which is great when your child's lovely knitted things are suddenly too short in the arm or body for them.
Please be aware, however, that there is not a complete knitting pattern anywhere in this book, for example for a jumper. But what is does give you is the know how, or the reference you need, to be able to tackle just about any knitting project.