The Babbington Press continues its step-by-step, layer-by-layer, version-by-version publication of Persistence with Version 1.4.
Added in Version 1.4 is Mark Dorset’s account of the making of the “In an Undisclosed Location” section of Persistence.
Version 1.4 is in the iBooks Store now. It’s free, but you will need an iPad or a Macintosh to read it. Follow this link: https://itunes.apple.com/us/book/persistence/id946754502