Reddit reviews Precalculus: A Prelude to Calculus

axler's precalculus

To add to my last paragraph, if you wanna go even more basic, you can get a pre-algebra textbook. That's basically a review of everything in the standard US K-7 curriculum. A reasonable reference book for this is Yang's A-Plus Notes for Beginning Algebra: Pre-Algebra and Algebra 1.

For the impatient, look at these three books (I use Amazon links here but I don't care where you buy them):

• Yang, A-Plus Notes for Beginning Algebra: Pre-Algebra and Algebra 1
  
• Axler, Precalculus
  
• Kiselev, Geometry, Book 1 (and optionally Book 2, though it probably goes beyond what you actually learned in school)