[PaulRobinson]

The physical copy will only get used by one reader (at a time). The ebook is going to be, err, "liberated" more often than not around a dorm?

In all seriousness, this is likely a nudge to a preference they have for how they want to sell this and how you should want to buy it.

[LtdJorge]

They advertise the ebook as having interactive features and more compared to the print version. Shouldn't it be the preferred one?