For those seeking a rigorous introductory analysis text, Spivak's "Calculus" and Ross' "Elementary Analysis" are recommended for beginners. If you have some background, Pugh's "Real Analysis" is considered an excellent choice, while Rudin's "Principles of Mathematical Analysis" is noted for its challenge and depth. Apostol's "Mathematical Analysis" is also mentioned as a solid option, with both Spivak and Apostol covering similar material but differing in approach. The 1967 edition of Spivak's book is deemed sufficient, as it contains all essential topics, and completing it prepares readers well for more advanced texts like Rudin or Pugh. Overall, starting with Spivak is advised before progressing to real analysis.