Previously, only available as an ebook, where it was No.1, it is now available for the first time as a paperback (It was No. 1 on Amazon.co.uk, Secondary Education.) This slim concise book is for those who starting their first chemistry course, and those who wish to understand basic chemistry. This books communicates understanding and helps the reader to comprehend the ideas in chemistry, rather than to learn by rote. This book would suit those studying chemistry 101, GCSE, iGCSE, prep school, HSC, SQC, OCR, AQA, Edexcel chemistry, CISCE, NCEE, Gaokao, HKEAA, CXC, WASSCE, GCE Ordinary Level, O-level, IBT, or eBT. Written in plain English, the reader is presented with the core concepts in chemistry, each idea building on the earlier ones. Exercises, with answers, help to re-enforce understanding. The author is a professional writer, was an examiner and was the Head of Department at one of the top one hundred independent schools in England. The writer lives in Oxford, England, UK. The book was checked by a Doctor of Chemistry from Oxford, and tested on actual students. The eBook was Amazon.co.uk #1 best seller in Secondary Education in 2019. Diagrams and table help the reader. An index will help learning. A full periodic table is at the back. Pocket size.