My professor (say Mr. X), a theoretical physicist, is in charge of a course on Math Physics in the undergrads. He had co-authored a book on Statistical Mechanics but he never mentioned anything about it to us, since it had no part in that course on Math Physics.
Now, that course was 2 semesters back. And in this semester, I have to study Statistical Mechanics, and this course is conducted by another professor (say Mr. Y). Mr. Y named a few standard books that almost all universities follow (Reif, Greiner, Huang) but not Mr. X's book (BTW X and Y are not enemies). But I came across X's book in google books and I liked it very much. But there is no soft copy of the book available on the net.
What I want to know is:
Should I ask Mr. X to give me a soft copy of that book?
The book is not old at all ( published in Dec 2016 ) and well available in the market. I dont know whether it sells good or not, since it was published only 10 months back and very people among my friends and seniors know about this book (although Amazon shows it out of stock). The book is really good and I have a nice relation (as student and teacher) with Mr. X. But there are commercial sides also that he might think, regarding the book.
So will he be offended if I ask him about a soft copy of his book?
In that case, how should I approach him?