Please note - the following subjects have all their learning material available online, and no additional textbooks are required:
Important note: An ISBN (International Standard Book Number) identifies a unique edition of a book.
Therefore: A hard copy edition of a book will carry a different ISBN to an e-book or digital edition. Please confirm directly with your textbook supplier whether you intend to buy a hard copy or e-book/digital edition. A revised edition of a book will receive a new ISBN even when it carries the same title as a previous edition.