Your original message said your flat file database was a "Books" database where each book was listed with Author's Last Name and First Name - I don't see that in this data that you posted. How is your data organized? What data is present there? Where is the Book title? Where is the book author last name, first name?
Yes, I have corrected the task a little, the given adatabase is more actual for me, it's artist database. Some names have 'digital' species, they are in the top of database, but then goes more or less organized alphabetic list.