According to our next guest, there is the internet we know and may not completely trust and then there's a part of the Internet most people don’t know about and should be really wary of.
It is part of the internet that is encrypted and hidden and an underworld home to pornography, black markets, trolls, criminals and extremists.
Jamie Bartlett’s new book, The Dark Net, brings us deep into this world. Bartlett is the director of the Center for the Analysis of Social Media at the think tank Demos. Before joining Demos, he was a research associate at the international humanitarian agency Islamic Relief.