TY - BOOK AU - Bono,Edward De TI - THE 5 Day Course In Thinking SN - 0-14-021014-8 U1 - 153 PY - 1967///. CY - London PB - penguin Press KW - Psychology N2 - The 5-Day Course in Thinking by Edward de Bono is a practical guide designed to improve thinking skills through structured exercises. It introduces three types of thinking—natural, mathematical, and lateral—to help readers develop clarity, creativity, and logical reasoning ER -