Simply stated but never understated. The book I should have written!
For my sins, I am currently teaching maths to level 2 (equivilent to Grade C in GCSE) in a prison, (I must have done something very bad in a previous life!) Consequently it is very challenging to get the students to understand basic concepts without too many wordy explanations - yet this author has done a wonderful job of stating the facts and leaving out the waffle. It is modern, bang up to date and yet gets the job done systematically, light heartedly and consistently. I simply ask students to read the relevant chapter in the book and then we discuss their understanding - as they say no pain no gain and this is probably the least painful approach so far. Students like the personalisation. It saves me a lot of effort saying exactly the same thing, over and over again.
It's ideal for proving the point to sceptical students - who don't always believe me just because I say it's true - this book therefore backs me up, succinctly and sweetly.
It is simply the best, the book I wish I had written!