There is a professor at our school whose textbook I was using in class A (not taught by the professor). I've studied the textbook from cover to cover and have spotted about twenty typos (many of which are quite serious, e.g. make an exercise unsolvable). I wanted to TeX them into a list and send it to the professor yet the following two aspects concern me:
I'm currently enrolled in his class B (not the book's subject). It's a rather small class and he knows me by name. Wouldn't it look as if I'm trying to improve my standing in his class by submitting the list?
It's known to me that the professor is aware about some typos (since he commented on a couple of them while teaching from the book two years ago). Yet for some puzzling reason there is no errata list on his website. It gives me an impression that he might be somewhat unhappy to see the extended list of typos.
The professor is working in the field I'm interested in, so I'd definitely like to make a good impression (and more importantly not to make a bad one). So is there a way that sending the list could harm me?