This is the book that accompanies the UK Channel 4 series of the same name.
The book is all about how to make money either through renting out property or buying run-down property and doing it up to increase it's sale price. I really like this book - it is clearly laid out and takes the reader through how to research a market, how to establish a plan and budget, how to estimate builders costs, which property enhancements are worth it and which arn't, and how to make the sale.
I was intrigued at her notion of a ceiling price for particular streets, which means that some enhancements (eg loft conversions) will cost more than you will get back, as buyers won't pay more than the ceiling price for an area no matter how many enhancements the house has.
She also makes other sharp observations, such as there will always be students who want cheap accommodation, but you need to accept that students don't usually know how to maintain a house (as it's their first time away from their parents) and that you should therefore not be renting houses expensively finished to them.
I really recommend this book, it's the most clear-cut common-sense approach to property developing that I've seen on the market.