In August 2018 Ethical Consumer found the following statement on the World of Books website
"At World of Books we are committed to minimising our environmental impact. Each month we recycle over 4 million books, saving 22,000 tonnes of books a year from going into landfill. All of our paper waste is recycled within the UK and turned into corrugated cardboard.
"We strongly believe that it is a travesty to simply throw away a used book when there is nothing wrong with it. We believe in giving each book the chance of finding a new home."
The company was therefore considered to have a sustainable business model and therefore received a positive product sustainability mark.

Reference: (2 August 2018)