I strongly recommend this book for your consumption: this book is extremely valuable for both its investing intelligence and its unique nature. No other book that I know of provides such a complete, and reasonable evaluation of revenue analysis, value opportunities via temporary profit margin squeezes, and screening for these opportunities via Price-to-Sales Ratios (PSRs.)
The heart of the book is that many investor's extreme focus on short-term bottom-line (P/E and earnings growth percentage movements) results can create extremely undervalued purchasing points in a great company with a temporary problem (determining this 'temporary' part is where his discussions about qualitative and margin anaylsis comes in.) Because revenue percentage movements tend to be both much more stable than earning percentage movements, and much less appreciated, PSR scanning may be the beginning of the most accurate type of mid-/long-term undervalued selection. (A good free scanner that has PSRs can be found here: [...])
Even if you reject the PSR method, this book's focus on profit margins and revenues can help you focus on what goes into the companies earning's movements. Not all earning growths are the same: you need both revenue growth for sustained earnings growth (you can only cut so much for so long,) and you need a healthy profit margin so that you can finance this revenue growth without large dept or share dilution. I would recommend being skeptical of a company that has growing sales but a sustained falling profit margin, I would be even more skeptical of earnings growth that isn't closely followed by revenue growth (almost disregarding it if it was a profit margin squeeze.) I think balance is key in this area.
The book also has good qualitative insights, has good appendixes, and is fairily concise to boot.
Some on this review page have objected to this book by claiming the author is arrogant. Nothing stood out to me in this book, however in "Common Stocks and Uncommon Profits and Other Writings" by his father Phil Fisher (probably the best qualitative fundamentals book by the way) he wrote in the preface about how his greater success comes from being a harder worker, being more driven, etc that was tasteless in my opinion (especially since Phil was then on his deathbed and it had a bit of a 'tribute' nature to it.) He's not that bad for what it's worth; I was surprised at how modest he seemed when he explained about how he turned a company around (when asked by the board he was on to act as a temporary CEO): he stuck to the point the appendix was making (i.e. that market research is much more important than expensive product R&D.) Anyhow, you're buying access to the author's ideas, not his friendship.
When part of me is secretly happy that this book seems to be out of print, my greed should be your hint. The Fisher's know what they're talking about, and Ken presents un-rehashed information.