Graham's writing is clear, concise and level-headed. He warns against unreasonable financial expectations and proceeds to explain his theories in sufficient detail to be worthwhile, without being over the comprehension of the layman interested in investing. The book is lengthy and "solid", as opposed to other finance books that hope to explain investment in 100-200 pages. Topics include stocks vs. bonds, inflation, security analysis, and margin of safety (Graham's analysis of the assets of a company in relation to its debt). Zweig's commentary is useful, with footnotes to clarify historical references and, occasionally, demonstrate instances where Graham's predictions proved untrue. At the end of each chapter, Zweig uses recent (up to early 2003) examples of Graham's concepts to make things clearer to modern readers. (Graham's text itself is his 1973 revision to the original 1949 edition.) Also helpful are numerous references to online articles at various sites (I cannot yet vouch for these links' present state.) Based on my understanding, I highly recommend this edition to anyone interested in this book. I feel that I gleaned more from this annotated edition than I would have from the original, without having to conduct additional research.