Question

Hi Rabbi, happy holidays.
I bought a book that I realized is a book of heresy/apostasy, arguing against the giving of the Torah, etc. The book is also full of slander and disparagement of the sages. 
My question is whether I may return it to the store in order to get a different book. 
Is there not an issue here of "do not place a stumbling block," etc.? Or perhaps specifically not returning it strengthens the purchase of the book, because then they will print more—since the book counts as more purchased if it is not returned.
 
Thank you,
Or