ive just bought the purple cow book so see what I think. Some is less useful as a UK person ie how to get a loan is probably completely different though anything pushing people to make detailed business plans is a good thing as it really makes them think about it.
For example when my friend Charlotte went for a loan to open a coffee shop and does wedding cakes she has a million qualifications and has worked with gordon ramsey and garry rhodes etc they asked her what qualifications she had. She was a bit confused and they told her the last people who aplied to open a polish restaurant had never run a restaurant, wern't polish and wern't chef's and didn't have a chef lined up. Well surley you would have those things covered before applying for a loan? its the basics!