My book, Mathematics Is About the World, is now available on Amazon as a Kindle. Be aware that the Kindle version was created from a PDF.
My book has very recently attracted the attention of Professor James Franklin, Professor of Mathematics at University of New South Wales in Sydney, Australia and author of An Aristotelian Realist Philosophy of Mathematics, published last April. He posted on my blog (www.mathematicsisabouttheworld.com) and we have exchanged emails.