AllThingsD:

Within days of its debut, Apple’s iBooks textbook store had already racked up a significant number of downloads.According to Global Equities Research, which monitors Apple’s iBook sales via a proprietary tracking system it doesn’t much care to discuss, more than 350,000 textbooks were downloaded from the company’s iBooks Store within the first three days of availability.…There were some 90,000 downloads of iBooks Author, Apple’s free textbook-creation tool, during the same time.

As usual, these numbers should be taken with a little salt – Global Equities Research doesn’t disclose how they came about the number and many downloads may be from those of us long past the days when we needed, used or bought textbooks.