Real Estate investor education-recommended reading

[Markeilsha R.]

I'm sure this question has been asked before, but what are some of the better books (preferably e-books) on the real estate investing topic? I am looking to gain education in a particular niche, but I would like info on contracts and deals I can get started in with no or little money down. I think i want to start in sub2 deals, flipping or lease optioning homes, but I also like the idea of mobile home investing.