I've been in contact with an author named Christine Garwood for the past couple of years because she's been working on a book about the history of the Flat Earth concept and the people connected to it. It's being released on April 20th and I wanted to give it a bit of promotion. Christine was kind enough to send me an advance copy (signed, no less!) of the book and I received it yesterday. I haven't read the entire thing yet, but I'm working on it and I have to say that I'm very impressed so far. It's a fascinating read and very well-researched to boot. I encourage everyone to give it a read:
Flat Earth: The History of an Infamous Idea.