Amazon's book recommendation algorithms that help customers discover new titles may have a dark side. A new report from the Institute for Strategic Dialogue says these algorithms steer people to books about conspiracy theories and extremism, sometimes introducing them to the work of conspiracy theorists who've been banned by other online platforms. People browsing a book about one conspiracy on Amazon are likely to get suggestions for more books on that topic as well as books about other conspiracy theories about everything from QAnon to COVID-19 vaccine, the report found. Other features, such as auto-complete in the search bar and content suggestions for the author or similar authors can also lead users down an extremist rabbit hole, said Chloe Colliver, head of digital policy and strategy at ISD. The pattern is similar to problems observed on other major online platforms like Google's YouTube whose algorithms have been found to direct users to extreme content, sucking them into violent ideologies.