Authors deserves respect for keeping this book free. We were lucky to have a paperback low-cost-poorer-countries edition of The MINIX Book[1]. The code in the

Authors deserves respect for keeping this book free. We were lucky to have a paperback low-cost-poorer-countries edition of The MINIX Book[1]. The code in the Minix book was an eye opener.The code clarifies the concept and sharpens the understanding. Later on in my career as driver/firmware programmer, Computer Systems - A Programmers Perspective[2] and Unix Systems for Modern Architectures[3] helped a lot to clarify confusions and mysteries. [1] https://www.pearson.com/us/higher-education/program/Tanenbaum-Operating-Systems-Design-and-Implementation-3rd-Edition/PGM228096.html https://www.pearson.com/us/higher-education/program/Tanenbau... [2] https://www.pearson.com/us/higher-education/program/Bryant-Computer-Systems-A-Programmer-s-Perspective-3rd-Edition/PGM2476825.html https://www.pearson.com/us/higher-education/program/Bryant-C... [3] https://www.pearson.com/us/higher-education/program/Schimmel-UNIX-Systems-for-Modern-Architectures-Symmetric-Multiprocessing-and-Caching-for-Kernel-Programmers/PGM37614.html https://www.pearson.com/us/higher-education/program/Schimmel...