Specs:
- Have a CLI for interfacing with the application: The CLI for this gem greets the user, allows them to select a bestseller list that they would like to view, and select a book from that list to read a description of the book.
- Pull data from an external source: This gem pulls data from the nytimes.com website under the Books > Best Sellers section.
- Implement both list and detail views: The first level of the CLI has a list of genres for the user to choose from, the next level lists books available and allows the user to select a book to see a description of.