This book is typically Ben Graham. Short, concise, elegantly written, laid back, it boils down to essential considerations while, of course, nothing is taken for granted. A brief and pleasant overview on useful considerations when one is checking financial statements, except for the fact that there is no treatment of the nowadays standard Cash Flow Statement, which can be seen either as a default or as an advantage, considering that there is some sound treatment of the Balance Sheet cash positions and of the quality of earnings in view of certain depreciation and maintenance charges.
At the end, there is also an over thirty pages lexicon of financial terms and phrases which can be quite useful.
It's true that the primary value of Graham's text is its framework, which provides concision in summarizing a potentially confusing topic. This framework persists through all four editions. Also, it's true that all four editions are pretty dated (there is no discussion of cash flow statement interpretation in any edition obviously, for example, although Graham alludes to the significance of cashflow interpretation somewhat disparagingly in the latter editions).
But all of Graham's guidelines for balance sheet analysis are still current in the latter two editions, as are his brief guidelines for bond analysis and earnings power. The first edition seems less useful in these respects.
One might assume that there is value in going back to the first edition of this small volume as one might go back to the first edition of Security Analysis. There are indeed nuggets in the first edition of Security Analysis which have been mysteriously removed from later editions. But that isn't true with The Interpretation of Financial Statements. If you can get your hands on a copy of the 1964 or 1975 edition of this book, you will likely find either more useful than this original edition.
Ben Graham was the author of many books and the voice of sound advice, his principles are not dated even today.