There is no book or guide which will make you a millionaire.
Sure there is:
It is easier to get 1,000,000 people to give you $1 than it is to get 1 person to give you $1,000,000.But of course both are unlikely otherwise many more people would be millionaire and will take a while, the $1's will be dilluted in your daily expenses.
I think get many from few sources is better than get few from more sources if you want to keep some big money