Abstract: Automated mapping between instances of content, such as e-books, and omnibus versions of that content can be performed without a resource-intensive full string search. In one embodiment, an efficient string search algorithm, such as the Boyer-Moore algorithm, is used to pre-process the individual book in order to more efficiently search for a match within the omnibus version. In another embodiment, a fingerprinting process is used to quickly find the beginning and end positions of a book within the omnibus version. The fingerprinting process can also quickly verify the match between the identified portion of the omnibus and the contents of the individual book without the need for a full string comparison. A mapping is then generated that enables the supplemental content to be updated for the omnibus version.