The book explains a lot of helpful, common calculations that real estate investors need to know. However, as with the first reviewer I also found a CLEAR mistake. Luckily I only bought this book as a review of sorts and am not using it as a verbatim reference tool. Please make sure you have an understanding of math before you take this book literally. On page 117 there is a mistake on the Operating Expense Ratios. For some reason the answers are actually (1-the OE Ratio), so where it says 73.7 it should read 26.3, which obviously changes it from an OE ratio to something else (maybe Operating Income Ratio). For something that is titled as an authoritative reference guide its sad that the editors didn't check out the calculations. These are the kind of books/mistakes that destroy kids education in grammar school; You know there's a mistake, but the teacher wont believe you!

The book is good, but I definitely wont bank my business on it without double checking everything.