The book industry in general is seasonal, and our understanding is that this is particularly true for what is known as "prescriptive non-fiction", which is the sub-genre many Leanpub books fall into.

For books in English, the trends follows the northern hemisphere educational season, so things slow down in the summer.

Books in all genres get a boost around Black Friday and Christmas.

To boost sales of your book, we recommend you sign on to Leanpub's newsletter sales, which you can do here:

Author > Books > [Your Book Title] > Store > Pricing

You can also make coupon links to distribute to people online and in your own email newsletter, if you have one:

Author > Books > [Your Book Title] > Store > Coupons

We've got some more advice here:

http://help.leanpub.com/author-help/tips-for-self-publishing-and-selling-books-using-leanpub.

Good luck!

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