The legendary bookseller, E. Haldeman-Julius was one of the biggest publishing sensations of all time. He sold over a 100 million books during the 1920s – which is an eye-watering amount of sales by anyone’s standards.

In all, he published around 2,000 titles as part of a series called Little Blue Books. What’s particularly interesting is that all the books were packaged in a similar way. They all had blue covers and there was little to distinguish them. Read the full story