[2] Bookboon offers free university textbooks[3] to students and content, focus lies on soft skills and personal development for bite-sized learning for professionals.

Soon after, the two brothers developed an innovative business model: offer free eBooks online financed by a few in-book ads, with a limit of 15% advertising space per book.

[6] In 2006, the company expanded its business model to Sweden, followed by Germany and the Netherlands in 2007.

In 2008, Bookboon expanded its operations to the United Kingdom and started publishing eBooks in English.

[7] In 2016, Bookboon was highlighted for its activities on the African continent, especially in terms of offering free textbooks for students based on employer branding.