There is so much free information online it seems a bit unnecessary to pay money for - especially when you could go to my website or even send me an email if you have a question about tomatoes and I'll get back to you with an answer.
However, it could be rather good to sit down and read all about growing tomatoes in a step by step fashion and learn from scratch about the different aspects of growing - all from one source.
Furthermore, when a problem occurs, a good ebook should have a section that can help with leaf diseases and fruit problems - this can be very useful and time saving. Whenever I need an answer about something it can take ages to read through all the forum posts etc. and never really get the info. I want.
So, are ebooks about growing tomatoes useful? ... I would say - yes they are- if they contain enough detail and are written by people who know their subject.
I've put together a little review of three popular tomato growing ebooks which I hope you may find interesting.