Nicely produced. The bulk of the book ( 80 of 147 pages ) is on how to use evidence from A-levels for the level 3 portfolio. As my students at not doing A levels, this is of no use to me.
The first section of the book ( approx 40 pages) is a useful summary of the math involved at level 3, but without any exercises.
There are around 12 pages on the Application of Number level 3 requirement, quite inadequate unless you already know what you are doing, and if so, you won't need this book.
There are 15 pages on non-A level evidence, but the suggestions, though good, are not a substantial enough base for a level 3 portfolio. There is neither a sample level 3 paper, nor a sample portfolio.