iBooks authoring

I have four days off, four days of typical bank holiday rain and cold. Perfect weather for working on an iBook.
I aim to produce a 28 page children's story about the battle between ninja dinosaurs and pirate robots. I have plotted the story out, and have a copy of tumult hype which allows me to add some rather nice interactions.
I don't expect to finish in just four days, but will be pleased if I can get some of the pages inked up and the interactions and animations tested.