Non Verbal Reasoning book 1 supplies an introduction to the NVR question types; this includes an explanation and practice questions (at difficulty levels 1 & 2). It includes an assessment paper.
This book provides a thorough introduction to the components of shapes with 5 sections to test pupil's knowledge and a recap section at the end of the intro. It further consists of 8 Non-verbal topics with an explanation of how to tackle these followed by 10questions at L2 and then 10 questions at L3. (For a comprehensive understanding of non-verbal reasoning, once completed complete book two which provides questions on the same 8 topics at L3 &L4.