My iBook Kinematics and Polynomials is now available for preorder on iTunes. You can see a preview at this link. At 75MB it is considered a relatively large download.
The goal is a presentation of the analysis and synthesis of kinematic systems that relies on the theory of polynomials. I wanted to include some Mathematica code by means of video screen capture and some animations. The iBook format makes this convenient, however the size of the document increases rapidly with each video.
Currently, it can only be seen on an iPad, but this is supposed to change soon, because the OSX Mavericks operation system is to include an iBooks application.