Contact
We’d love to hear from you, whether you’ve spotted an error, are using one of our books in a course, or just have a question. We read every message, though as a small press it may take us a few days to reply.
Corrections and feedback
Found a typo, an error, or a passage that could be clearer? Please let us know. Corrections go into the next version of the PDF, which is always free to download.
It helps to include the book and version (shown on the copyright page, e.g. “Version 1.1”), the page number, and the figure or section involved.
Using a book in a course?
You don’t need permission to assign our books, but we’d be glad to know. Telling us your course, school, and roughly how many students helps us understand how the books are used.
Everything else
Questions about the books, print copies, permissions, or anything else.