im reviewing from halliday and resnick 2nd edition. i chose 2nd edition, 1960s, on purpose because of advice from older professors who said material has been watered down over the years. the book is good but im worried that there are certain problem types it won't include because it's so old. also there's the fact that it only has about 30 problems per chapter. i know it's a matter of knowing the material and not drilling it but for standardized tests i find drill and kill usually leads to the highest score.
should i buy a newer book?