37 books • 8 series
Cambridge IGCSE™ Co-ordinated Sciences Physics Student's Book (Collins Cambridge IGCSE (TM))
Cambridge IGCSE™ Co-ordinated Sciences Chemistry Student's Book (Collins Cambridge IGCSE (TM))
Edexcel International GCSE Physics Student Book (Collins Edexcel International GCSE) (Collins International GCSE) (Collins Cambridge IGCSE (TM)) (Collins Cambridge IGCSE (TM))