Sigma’s Bookshelf was started up in 2016 by teenager Justin M. Anderson, whose debut book, Saving Stripes: A Kitty’s Story, was released in 2015. It has been a huge success, selling more than 200 copies in its first year on the market, and helping to raise thousands of dollars for S.O.S. Rescue Relief, Inc., a nonprofit whose mission is to prevent euthanasia in adoptable pets.

Justin wanted to help his fellow teenage authors enjoy their own publishing success, so with the help of his parents he started up his Sigma’s Bookshelf. The company name was inspired by Sigma, one of the characters in Justin's novel, Nothing But Trouble. It was published in 2017.