This was my assembly book when I took assembly in college. This book teaches you how to program in PC/370 Assembly. PC/370 an operating system run on IBM mainframes. This is defiantly not for game programmers. It is written clearly and has nice flow charts. It has no sample code! The language is similar to x86 assembly, but not close enough to buy the book. I wouldn't recommend this to anybody unless they were planning on working with mainframes.