Some e-books are free for students when they are on the university IP.
So can anyone provide a list of free e-books for students and free e-books in general about (stochastic) volatility modelling?
There's no free lunch ! However, the best book (in my opinion) is "Stochastic Volatility Modeling" by Lorenzo Bergomi. On his web site, you can download free chapter and pdf from his presentations :
for free chapterhttps://www.lorenzobergomi.com/contents-sample-chapters
for papers : https://www.lorenzobergomi.com/papers