The “Maths for GCSE and IGCSE (R) Textbook, Higher (for the Grade 9-1 Course)” by CGP is a comprehensive book published in 2016 specifically designed for students studying Mathematics at a higher level. Authored by CGP, this textbook provides in-depth coverage of key mathematical concepts relevant to GCSE and IGCSE curricula. With a focus on clarifying complex ideas and providing practical examples, this textbook is an essential resource for students looking to excel in their mathematics studies.