If you are looking for a free alternative that covers the same material (Limits, Derivatives, Integrals), OpenStax Calculus
The 9th edition maintains Stewart's legacy while adding modern instructional tools: If you are looking for a free alternative
may offer access to the text or related study manuals under a subscription model. Free Open-Source Alternatives If you are looking for a free alternative
While "Calculus Early Transcendentals" by James Stewart is a commercial textbook, there are several ways to access it for free: If you are looking for a free alternative