Ive used this program now to produce almost four chapters of a fairly technical book that has a great deal of interactivity and mathematics and would like to point out several areas for improvement: 1) Equation editing and integration is poor with third party apps filling in the glaring holes but only doing so barely adequately; 2) Why are table cells treated differently from text? It is impossible to position graphics and resize within a table cell; 3) Importing and using interactive content is also not well supported and html content must be created using a bug-ridden version of DashCode. If interactivity is important to eBooks then why is Apple not upgrading DashCode to produce this content more easily? Overall iBooks Author is suitable for most simple books that have a lot of pictures and movies but producing equation-laden books with interactive content is still much harder to do than is necessary. If Apple could fix these areas, producing eBooks would truly be an enjoyable experience.