i'm with glush.
i'm really bad with exams, if you gave me a book to read i just wouldn't be able to concentrate.
i paid for groundschool and exams at our school, and having a lecturer go through slides and explain stuff is perfect. i also have the pooleys air pilot books and they're ok but have too much other guff in them.
the lecturer gears the lessons towards passing the exam so you're better prepared.
that said, the PPL confuser, AFE Q & A simplifier, and the exercises at the end of each book are a great help.