In my humble opinion this is a horrible book. There is zero connection between the expectations created from the title and description with the actual contents. It is centered around creating a complete "model" and valuation of Amazon, and I'm really not sure what audience this book is aimed at.
It provides tips and tricks for Excel while building the "model", tries to explain basic accounting and how the three financial statements work—the balance sheet chapter starts with the definition of what an asset is and distinguishes current from long-term assets/liabilities. How can someone who doesn't know basic definitions even begin to build a model? The book is all over the place. If you remove "Amazon" from the text you probably won't even be able to guess what kind of company we're "modeling" throughout 400 pages.
The approach is utterly naive and 100% not the standard on the "Street". The first step is making revenue projections in the income statement. How? The book tells us to fire up Yahoo Finance and look at analyst estimates. That's it. That's the revenue estimation for the final "model". Most items are estimated using one of the following "seven methods of projection": Conservative (maximum of past three years), Aggressive (minimum of past three years), Average, Last year, Repeat the cycle, Year-over-year growth, or Project as a percentage of another line item.
No revenue schedule, no cost schedule. Just choose one method and print it out. How is the selection made? Completely arbitrary. If numbers were kinda close during the last three years, take the average. If they were all over the place, choose method 5—copy the last three years' values and paste them into the projected years. After every naive projection comes something like: "It is safe to say this line does not have a large impact on the overall valuation, so we can keep this assumption for now and tweak later if needed."
Can you guess what this means? After our "model" is complete, we fire up Yahoo Finance again, and if our bottom line differs dramatically from what actual analysts estimated, we just start tweaking random parts until we achieve a bottom line in the Yahoo Finance range. Why are we even trying to create a model? Just take the stock price analysts estimated and call it a day.
Another issue is that this second edition has no reason for existence—it's a total money grab. Nothing new compared with the first edition which "models" Walmart, but it's missing parts because of Amazon's nature. Amazon doesn't pay dividends and you want to model them? "Refer to my first edition of the book." Want to know about accelerated depreciation? "Please refer to the first edition book on Walmart." Line items don't match up? "See my book on Walmart for an example."
The funniest part is probably the definition of Goodwill: "Goodwill is an intangible asset that typically arises as a result of an acquisition. See my book titled Mergers and Acquisitions for a more robust explanation on goodwill. Let's list this as a separate item. So we can hardcode $14,754 and $15,017 into 2019 and 2020, respectively." It's absent. Pignataro could have explained in that line that goodwill reflects the premium paid above net asset value, but no—he wants you to buy another book, which will probably be as useless as this one. He explains MACRS tax depreciation briefly, but Goodwill is too much for a book about investment banking and private equity?
If you show this "model" to someone and they ask a single "why?" your best bet is to leave the room crying. The assumptions are inexplicable and the results based on Yahoo Finance. Same for the valuation process—very shallow material starting with simple definitions like the present value of a cash flow.
Who is this book aimed at? Someone who knows nothing about the subject and wants to model a public company. Why would they read this book? They won't be able to model anything after it. They'd need to first read about financial statement analysis, then take a proper modeling course with actual good practices. You can't learn accounting, financial statement analysis, Excel, modeling and valuation in 400 pages written by Paul Pignataro.
You could have gotten actual good modeling practices if half the book wasn't dedicated to Excel sheets covering page after page with basic operations step-by-step—even though all Excel material is provided for download anyway.
The sections covering Depreciation Schedule, The Debt Schedule, Circular References and Operating Working Capital offer some decent starting points and understatement of how these processes take place. Also, most excel tips are really useful but they are just excel tips, not modeling tips. What's the point?