Although the table of contents is a bit of a mish-mash, reflecting the author's converting it from a list of potential articles for Dragon, the book is well-written and the content remains surprisingly relevant, thanks in large part to the OSR, which has turned this into a guidebook of how to play in old-school dungeons. There's also interesting material on gamemastering and campaign design, though it's a bit more scattered and has largely been superseded by more comprehensive books on the topic.