Jae Shim and Joel Siegel introduce their audience to the budgeting process in both the profit and non-profit sectors. Unfortunately, the authors fail to deliver on the expectations that this book generates for several reasons. First, and most importantly, the third edition of "Budgeting Basics & Beyond" contains a number of mathematical errors or missing numbers. Think for example about the second table of example 1 (p. 254), exhibit 17.5 (p. 263), and exhibit 20.5 (p. 316). Secondly, the book under review also contains errors in the legend of a number of exhibits and typos in text formulas. Think for example about exhibit 1.3 (p. 15), the bottom of schedule 1 (p. 79), and the definition of profit variance analysis for multiple products (pp. 138-139). All these errors confirm ironically what Shim and Siegel quote on p. 264: `Between 78 and 97 per cent of spreadsheets contain "serious material errors" with a potential to devastate the bottom line.' Thirdly, the book contains too many "skeleton" templates with little content or no content that add value to this manual. Think for example about the templates which are reproduced on pp. 205-223 in chapter 13. Fourthly, the third edition of "Budgeting Basics & Beyond" does not make extensive use of Excel screenshots to clarify a number of concepts. Think for example about the income approach to valuation, more specifically the discounted cash flow (DCF) method (pp. 297-302). To summarize, the book under review should be redone and proofread thoroughly before being put on sale anywhere.