text: There are lots of books on critical thinking. If you are asking this on behalf of a child, start out easy, and buy critical thinking work books, like 1st grade, and work his/her way up. If you are asking on behalf of yourself, buy books on the subject from Barnes and Noble or Costco. They seem to carry the best ones. Buy more than just one book, so you can develop more and more sides of the skill. .Buy an SAT prep book from the College Board, (about $17) and read the critical reading sections. Answer the questions after. You'll get better at reading critically as you do it more.\n\nHope this helps!