The Big Red Book is Ireland’s leading supplier of easy to use Bookkeeping software for small and medium businesses.The Big Red Book is the simplest Accounting and Payroll software on the market. Whether you write up your books manually or have tried other packages and found them too complicated, the Big Red Book offers a simple and practical Business Software solution .Our philosophy has always been to keep things easy, and we have accomplished this with the development of our Accounts Packages. Accounting packages for Irish and UK Businesses.