You might look into the "import.log" file in your My Digital Editions directory. It should keep a record of every book you've imported to ADE (along with the dates they were brought in). It only notes title of the file but ... might be of use. With a little effort I'm sure you could write an Excel macro to import the titles/dates to your spreadsheet automatically.
An example of the file is here:
Code:
1.7.2.1131 WIN Fri Nov 19 01:34:00 2010 UTC
License Update Starting
Attempt to convert: Eclipse_of_the_Sunnis.epub
Success converting License for restore\books\Eclipse_of_the_Sunnis.epub into Eclipse_of_the_Sunnis.epub
To your original question, though, it is my understanding that Overdrive tracks checkouts anonymously in aggregate for some purpose or other. It seems the data are not accessible to the library in any convenient format (according to correspondence via the
Help Desk).