David Isaac and Terry Steley have tried to cover too many bases in this book. Although their scope is ambitious and the writing is accessible and informative, there is no real depth to most of the issues covered - 212 pages for 17 chapters says it all.
Where the book fundamentally falls down is in its too-traditional approach to valuation - you almost expect the authors to talk about "that there new-fangled DCF", and they certainly mix pure valuation issues (discounting cash flows) with capital budgeting issues (use of NPV, IRR, etc.). DCF isn't a noun, chaps, it's a verb!
As most practitioners will by now be familiar with the use of spreadsheets to project the investment value of any piece of real estate and as a quant tool to make investment decisions, Isaac and Steley have really missed the boat - Property Valuation Techniques reads more like a 'how-to' manual for your high street surveyor 10 years ago than as a statement about where the science of property valuation rests today.
Sadly, as a lot of surveying courses still require you to have a grubby copy of Parry's Valuation Tables (and no calculator), this book may well still have a market - although this is itself is more of an indictment of the backward-looking nature of academe in the area than the utility of the 'traditional' approach to property investment valuation.
All in all, I liked the history lesson - but for that, there's actually a better book: "The Valuation of Property Investments" (Enever and Isaac). It's still like watching Open University programs from the 70s at 3am when you're drunk, though.
The book any budding real estate scumbag SHOULD buy instead for valuation is Brown and Matysiak's "Real Estate Investment: A Capital Market Approach". It's not perfect, but it doesn't waste your time. Geltner and Miller's "Commercial Real Estate Analysis and Investments" also scores highly unless you're looking for that MBA-friendly doublespeak.