So far the app has about 12,000 downloads in 89 countries worldwide.
Apple also saw more than 200 million downloads of its new operating system iOS 7.
The top three downloads from Overdrive were all by Stephenie Meyer, whose Twilight books are directed at tweens.
OverDrive said that downloads of digital material to the 8,500 libraries it supports exceeded 10 million items.
He downloads his favorite covers and searches online booksellers to locate the cheapest copies of the books.
E-book use on the iPhone exploded, with over a million downloads of the Stanza application alone.
“We spotted some downloads to get pulses racing,” according to the statistician at the Torrentfreak website.
To transfer data or programs from a server or host computer to one's own computer or digital device. Compare upload.