Alberta Book Ninjas was created on May 10. Within eight days, the group had 1,000 members. As of June 9, the group has 2,500 members from across Alberta.“People have joined from places I haven’t even heard of,” said Paik. “I put in pretty much every city, village and hamlet that I could think of that had a population of more than 500 people.”To get books, you must share your address either publicly or request an address be given or passed along through Paik.An online security expert, who spoke on the topic of “Ninja” Facebook groups in early May did caution participants who join.[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]Paul Davis said putting your personal information online could have lasting.