E-business

I’m looking for informations about e-business. I’m not working in this field of activity but I’m very interesting in E-business implementation in my company.
I’ve read several articles about this subjet but no one were very clear about the subject.
So I’d like to understand what is exactly e-business and what are the links between e-business and e-procurement, e-development, e-…
I’m trying to find informations about companies that have experienced this activity (successful or not), how much they spend for it, the problems they had to face with and what kind of benefits they win thanks to e-business activity…

Thank you.