There are many ways to improve discoverability for authors and their books, and this post lists many of them.
discoverability
Discoverability: Key to the e-Bookstore
Discoverability: Key to the e-Bookstore describes how searching an e-retailer is constructing a virtual bookstore shelf
Metadata for Self-Publishers, Part 1
Metadata for Self-Publishers, Part 1: The concept of metadata, how metadata uses keywords and information about the book to make it discoverable to searchers
Saturday Q & A With the Book Designer 01
Saturday Q & A With the Book Designer 01 Video blog, Joel Friedlander discusses Bowker’s Books in Print Database and book metadata for self-publishers