This is a useful book, but I find the number of typos in equations and the discussion of the text annoying. I say this after going through Henden and Kaitchuck, Hall and Genet, and Romanishin's textbooks on photometry and I can say I needed these references in addition to this book to get the most benefit from this book. The typos are being addressed by Brian Warner on his website (search minorplanetobserver to reach the site) and here is now an errata available in pdf format. This is to be applauded and will definitely make the book more useful. Kudos to Brian Warner for doing this. Springer should take more responsibility for this though since they publish these advanced amateur guides and charge textbook prices for them. Other books in the Springer series I have bought also suffer from more typos than average and this can only be attributed to lax editorial supervision. Springer should do better.
I like this book a lot, but it is short and the text needs supplementing with other sources. The author admits this and suggests Henden and Kaitchuck. There are references to sources in the text that are not in the index or the endnotes and an update to the index to fix this would help the book too. For example, the author cites the first edition of this book for a longer discussion of certain topics and then you find out that the first edition was privately published and is not easily found. I think you can request a copy from Brian Warner though.
There are few works aimed at this level though that discuss photometry with CCD's instead of older equipment so the book fills a valuable niche. There are worked examples in the appendices and the author shares his practical experience and workflow suggestions in the main text. These are worth the price of the book and make it one of the better guides out now for students and amateurs trying to start photometry.
I just wish the book referenced fundamental formulae more and depended less on references to commercial software products. It does assume the user will be using some commercial photometry package and Excel type spreadsheets for analysis and this is probably true for the intended audience.