1. Check the copyright page: the copyright page will indicate the printing times and printing date.

2. Consult the publishing house: contact the publishing house of the book and ask the relevant personnel about the printing quantity. If the book is published at one's own expense, the author should pay attention to the circulation and marketing situation, while the publishing house generally does not bear the marketing responsibility of the book at one's own expense.

3, access to relevant information: in some book promotional materials or the author's self-report, the number of prints will be mentioned. In addition, some online platforms also have information on the number of books printed.