Open a spreadsheet program on your computer.
Enter the name of each book in the first column.
Write the book's genre, such as "joke book" or "nursery rhyme," on the same row in the column next to it.
Write the name of the author, last name first, in the next column.
List the series the book is part of, if applicable. This will allow you to look up an entire series of books quickly and easily.
Type whether each book is fiction or nonfiction in the next column.
Repeat the above steps for each book you enter into your database, and then save it. When you are finished, you will have a complete inventory of your books, and you'll be able to quickly locate a book by genre, author, series or other criteria by simply sorting a column. Keep updating the inventory as you get new books.