I didn't specifically target TLPI at the university market as I wrote it. But, by now I've had emails from a number of university teachers who are using TLPI as a required text or as recommended reading for courses on Linux or UNIX system programming.
If you are a teacher or a student using TLPI in a university course, I'd love to hear about it. In particular, I'm very interested to find out more details about how TLPI is being used as a course book, with the idea in mind of improving a future edition of the book for use in that market. If you're a teacher or a student using TLPI, take a look at the questions here, and drop me a mail.