Ancient World bloggers can take advantage of this resource by linking into this database when referring to books. An example
Ronald Syme took a dim view of Augustus' exercise of power in his The Roman Revolution.
Following that link provides readers all the information they need to track down a book. It even uses your IP address to list holdings in "nearby" libraries. If the library makes a digital version available, that information is noted as well.
This isn't my idea. I can't remember where I saw it first, but I would give credit if I did.