This business sells niche and hard-to-find books around the world via the internet. In the past year the Gloucester company has run a series of promotional campaigns, such as refer-a-friend coupons, to increase its customer base. It recently ran a giveaway of more than 500,000 e-books, which helped to attract more customers to buy from its range of printed titles. During the recession, the popularity of vocational and lifelong learning publications has increased, helping sales to grow 46% a year, from £24.1m in 2007 to £74.3m in 2010.