Most organic chemistry textbooks fall into two camps: the "recipe books" (telling you what happens) and the "theory books" (telling you the math behind it). Vollhardt and Schore bridge this gap masterfully.
Most textbooks treat IR, NMR, and Mass Spec as separate chapters at the end. Vollhardt integrates spectroscopy throughout the text. By the time you learn about alcohols, you are learning how to identify them via spectra. This reinforces learning and mirrors real-lab scenarios. Quimica Organica Peter Vollhardt Pdf