Bestseller and Textbook

Bestseller noun - A book that has had a large and rapid sale.

Textbook and bestseller are semantically related. in published document topic. In some cases you can use "Textbook" instead a noun "Bestseller".

Textbook noun - A book used for instruction in a subject.

Bestseller and textbook are semantically related. Sometimes you can use "Bestseller" instead a noun "Textbook".