[carrie5012]

I was looking at their library policies and procedures and it seems items can be checked out online:

III. AvailableLibraryMaterials
Materials and Devices Available for Check-Out
 eBooks – available for checkout online through our digital content catalog on the BiblioTech digital library’s website.
 AdulteReaders
 Children’seReaders
 eReadersforthevisuallyimpaired

Although it seems the library is only open to those who are residents of Bexar County or who pay property taxes there.