Being self published, was it difficult to get the book into major book selling sites (eg, Amazon)?

It was actually super easy. Amazon in particular are great supporters of indie authors, and make it very easy for anyone to publish their books on their site, both through their Kindle Direct Publishing program (for ebooks) and Createspace, their physical book (and other media, music, film, etc) producers. Individual authors can easily sign up to these services and their books will be distributed through Amazon and other major sources very easily. I also used Smashwords to distribute my ebook, which again distributes it across many major ebook sellers.

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