For those seeking a gentle introduction to real analysis, "Calculus" by Michael Spivak is highly recommended for its readability and focus on analysis within the real numbers. For a broader approach that includes metric spaces, Hilbert, and Banach spaces, "Foundations of Mathematical Analysis" by Richard Johnsonbaugh and W.E. Pfaffenberger is suggested as an accessible option. Additionally, for those interested in topology, "Introduction to Topology" by Theodore W. Gamelin and Robert Everist Greene is worth considering. "Real Mathematical Analysis" by Pugh is noted as an excellent introductory text, while "Understanding Analysis" by Stephen Abbott is also recommended for its clarity and approachability.