I like him.Yes, as soon as she started with all this Mrs Beeton bollocks, I thought- this book already exists. Also Martin Lewis sold it quite cheaply, IIRC.
He wrote something for GCSE economics (might have been A levels) as well as putting together a book on finances/taxes for teenagers. He then made sure every child in year 11 got a copy. For free. He actually made a loss but didn't care because he is so passionate about 'good financial health'.
I don't doubt he's made a lot of money, but most of the stuff he does is for free.