Books with errors are quite dangerous and would be very helpful find the errors of a book and reported them in some place where everyone can check if the books he is reading has errors and correct them before struggling with them. Can we use Mathematics S.E. for this reason? Can I post a question, (community question?) like this: **- Errors in "A Book of Abstract Algebra: Second Edition" by Charles C. Pinter -** and leave it open so every one who thinks to have find an error post it as an answer. I think this could be very helpful... And it can save a lot of time and **errors**!