This book is a useful way to get students to think about problems in an orderly way, using a three-step "Detect, Recall and Solve" system. The benefits of the method may not be immediately obvious to students, who are likely to rush to an answer, but persistence in following the steps should help students as soon as the solutions become less obvious (in the Mixed-Up questions section). There could be a case for adding a fourth step that involves identifying the information given, rather than just detecting the nature of the problem, but this refinement doesn't detract from the basic method. The questions themselves are nicely pitched towards GCSE-type problems rather than easier KS3 content although there is some simplification to make topics more accessible. This is a great resource to have available but be aware that there is less chemistry content than physics and biology.