Using old prep books, is it bad?

Hi, I am using older editions from the Princeton review, Barron’s, and Mc graw-hill’s in order to prepare myself for the math II and physics tests, Can I trust these materials? (They range from 2012 to 2014).

Thanks in advance

You’re good.

Those are completely fine. The subject tests have not changed in forever (though in my opinion they no longer match high school curriculums at all and are due for an update), and no new information has come to light that will change what test prep companies think you should know about the tests. They create new books every year to make you think you need to buy the most updated version, but all they really do is change the cover art and the year.

Ok, I will take that into account, thanks.