Thanks Scarlett. I also liked the explanation and sample questions bit. As much as anything, I wanted to get a set of books where I knew that, if we went through all the areas covered in those books, I would have the 11+ maths syllabus covered; so if they're too hard for a year 4 child at least I'll know what to plan for and what I'm supposed to be doing
DS also likes the 10 minute books, mainly, I think because the time limit is strictly stated! He did an English one last night; learned what 'masculine' meant (gander, duke, nephew etc.) and went round talking in a very deep voice for the rest of the evening!