2nd edition is the best one. Mine is falling apart at the spine but I love it
OTOH, the "X Chapters" of the 3rd edition is one of those analog-guru secret handshake books where The Masters take the Apprentice deep into the bowels of kick-butt analog engineering. Where simplification are eschewed for the Real Answers. https://x.artofelectronics.net/
What little the 3rd ed. does say about construction techniques isn't particularly helpful (or even true), such as when they exaggerate the challenges of working with SMT parts on page 65. It was probably better that they didn't try to go any deeper.