Decent beginner's guide on how to tie some basic knots. It provides step-by-step photos/instructions and multiple knot variations in some cases, e.g. bowline, double bowline. It also briefly explains what the knot's used for.
There's a section on decorative knots at the end which I mostly didn't bother with, but learned all the rest so the instructions work.
It probably goes without syaing that no string/rope of any kind included with book so you may have to buy some too. Couldn't possibley advise what's best although I can tell you that I used a length of about 80cms of webtex para cord which is relatively cheap and worked fine, though ends start to become frayed after a while. It's so cheap though, you can just cut the ends off or cut another length without losing any sleep.
I found I needed to practise tying new knots about 5 times before I stood a chance of remembering how to do it.
The book's fun, a good travelling companion, and could actually be useful one day; of course definitely useful if you're due to go camping or on expedition somewhere.
I'd definitely recommend this book to children aged ~9 upwards, and of course adults with a leaning to this kind of thing(if they like Ray Mears, they'll probably like this!).
One of the more applicable/useful Collins gem books in my opinion.