A Comprehensive Review of "College Algebra" by Louis Leithold
Conclusion
Internet Archive: Offers borrowable digital copies of College Algebra and College Algebra and Trigonometry by Louis Leithold.
Most students stop at “A” level problems. Leithold’s “C” problems often require proofs or generalizations. Doing just 2–3 “C” problems per section will transform your understanding of algebra from procedural to conceptual.
Recommendation: If you are serious about learning math, try to find the 5th or 6th edition of College Algebra by Leithold. These editions strike the perfect balance between modern readability and classical mathematical rigor.