The Explosion of Platform Books

Prior to the release of The Age of the Platform in 2011, nearly all of the research on the topic of modern-day platforms was confined to economics textbooks and articles in obscure academic journals. Put differently, at least to my knowledge, The Age of the Platform was the first mainstream business book to address not only the platform as the most important business model of the 21st century, but the Gang of Four: Amazon, Apple, Facebook, and Google.
To this extent, it's fair to call the book a seminal text, as a few reviewers have. An Amazon search on "platform books" reveals a burgeoning body of current and future work on the topic. Alternatively, consider the following visual that represents a striking number of related and/or derivative books:
It'll only take a moment.