it's nothing to write home about, it's just 20 pages with some scales. The descriptions says ''it will develop the technical skills you need to play jazz. It introduces patterns characteristic of the idiom, like the blues scales, the b3 pentatonic and various modes. It also explores these patterns on the roots and key centres commonly found in jazz.''
But in fact, it's just a short compendium of scales. The 'book' says nothing about on what harmonic context you can use the b3 pentatonic or the modes. I understand that this is not an jazz harmony book, but the description gives an idea that the 'book' is more than it really is, which it isn't. I also don't understand why for some pentatonic scales, like the Bb minor pentatonic, fingerings are given only for 1 octave, and I can't figure out how to extend the pattern in more than 1 octave, unless I play with thumbs on black keys, but am not sure if I am doing the right thing.
At grade 5, is it not expected to know all the scales in all the keys, as for minor and major?
I also define it 'book' (in quotes) as I don't know how else to define it. Not a bad buy for the used copy I bought at £ 1.25 , and to me a quid more or less isn't that important, but for £ 8 including shipping, I'd probably pay more and try to find a book for jazz piano improvisation where all scales are illustrated and more. So, not a bad product, just rather mediocre.