I now marked down the price of my iBook "Pitch It!" down to $0. The whole iBooks experience has been an interesting one. First I thought that publishing a book through Apple's platform would be like writing software: updates would automatically be pushed to all readers. The iBook format would also use all the interactive/touch features of the iPad.
Two and a half years later I must conclude that web design engines such as Squarespace have now become so powerful that they match iBook's interactive capabilities. I have ported my entire book here (it is free as well). It works great on iPad, but also on other tablet devices, mobile phones, desktop screens. The source code is also easier to maintain and update.
Art: Degas, The Rehearsal, 1873