Bookland

Bookland provides ISBN and ASIN classes, which should come in handy when trading books online.

Installation

gem install bookland

Usage

include 'bookland'

ISBN.valid?('9780262011532') # => true
ASIN.from_isbn('9780262011532') # => "0262011530"
ASIN.to_isbn('0262011530') # => "9780262011532"