This is an excellent book for those people who are considering setting up their own business but don't think they can afford to. While not all the examples started with $100 most of them did and the rest started with less than $1000. Considering what $100 in pounds these days then that's not bad going.
The book provides lots of great examples - all of which are people who started with little and made excellent profits - and keep on making them. There are some useful checklists and worksheets throughout the book to take you through the start up process and despite the title uses examples from all over the world so this book is relevant to everyone.
For this price I'd definitely say buy it. It's an interesting book which you can dip into when you need to, with all the worksheets also available on line.