Among statewide consortia, OhioLink is seen as a clear leader in the successful implementation of a patron-driven interlibrary borrowing system. This capability, often implemented as an enhancement to the on-line catalog system, enables patrons to borrow directly from consortium members other than their home library. The availability of this feature has increased the number of books exchanged among libraries to a level not imagined before. Most research on resource sharing has focused on factors such as traffic volume, costs, and efficiency. There is a lack of research data on the characteristics of books that patrons borrow directly from non-home member libraries, even though such data could help address important aspects of resource sharing, especially pertaining to content. A current research project attempts to fill this gap by examining 40,000 sample interlibrary book-borrowing requests initiated by patrons via OhioLink. Book characteristics such as age (publication date), subject (LC and DDC classes), distribution among membership (holdings count), and availability at the home library are used to create a patron-needs profile. This information will contribute to our knowledge of patron borrowing behavior in consortial settings, and may be useful to the future implementation of patron-driven interlibrary borrowing systems.