iBook Sizes?

[pyrodex]

It has been mentioned that the iBook will use the popular ePUB format for it's eBooks. I went online and found a free website providing ePUB books and for example Moby Dick was around 688KB for a 550ish page book. Would it be safe to assume this is going to be the same size we could expect from Apple or are they going to add their own twist into the book format causing an increase in size? The main reason I am asking is to size out an iPad for my Girlfriend. She honestly may have a few tv shows/movies on the device but I suspect more iBooks than anything else.

 

[Chupa Chupa]

Pure "text" books should weight in at or under that. However, if they contain lots of pictures/diagrams/video then could be more. Even still I can't imagine they be more than 2MB max.

 

[Jaro65]

Pure "text" books should weight in at or under that. However, if they contain lots of pictures/diagrams/video then could be more. Even still I can't imagine they be more than 2MB max.

It really depends on the content. I recently purchased a stats textbook for DX and it was around 20MB. The graphics were really lousy on it though (obvious scans but not at a high enough DPI resolution) and so I returned it.