Having recently worked through all three of Mulford and Comiskey's financial reporting texts, I'd like to comment on them as a group.
The Financial Reporting Game contains unique material which I have not seen outside of specialized academic journals, and discusses most of the parameters I use in my own earnings manipulation model, developed through painful experience and correspondence with other practitioners. I suggest this text as a more efficient means to acquire this knowledge. The first five chapters of introductory material discuss the motivation and consequences of earnings manipulation from the viewpoint of the regulator, the reporter, and the user of financial statements. While the preliminary chapters are less quantitative than the rest of the book, I believe they cover the subject far more comprehensively than Fridson's Financial Statement Analysis, or any other text I can recall.
Guide to Financial Reporting and Analysis is indispensable, and one of the most practical texts on applied security analysis available. The efficient search procedure for non-recurring items is alone worth the cost of the book. I'm convinced that one of detriments to effective use of periodic and annual financial statements is the opacity of the notes to consolidated financial statements and their frequently indecipherable relation to the consolidated tables themselves. The authors propose and demonstrate a framework for relating complex financial notes into the core activity of the security analyst, which is measuring the sustainable earnings power of the corporation under study.
Financial Warnings predates Guide to Financial Reporting and Analysis by four years. Its focus is on how corporate accounting choices can change perceptions and calculations of sustainable earnings power [and consequently stock valuation]. Financial Warnings suggests and demonstrates clear techniques for analyst restatements. I found it helpful to work through Financial Warnings after I had completed Guide to Financial Reporting, in order to test my understanding of the accounting principles discussed.
To sum up, I strongly feel that if you take the time with a spreadsheet and a 10K to work along with the dozens of examples provided by the authors in each of the texts, the quality of your financial analysis will improve both in accuracy and in rigor.