The Babbington Press continues its step-by-step, layer-by-layer, version-by-version publication of Persistence with Version 1.5.
Version 1.5 of Persistence is now in the iBooks Store.
Added in this version is Mark Dorset’s account of the making of the “In the Marketplace of Ideas” section of Persistence. Version 1.5 is free, but you will need an iPad or Macintosh to read it. To download it, follow this link: https://itunes.apple.com/us/book/persistence/id946754502