Car­olyn Mack­ler is the author of the pop­u­lar teen nov­els, The Earth, My Butt, and Oth­er Big Round Things (A Michael L. Printz Hon­or Book); Tan­gled; Guya­holic; Veg­an Vir­gin Valen­tine; and Love and Oth­er Four-Let­ter Words. Car­olyn’s most recent nov­el, The Future of Us, cowrit­ten with best­selling author Jay Ash­er, has received starred reviews, and the film rights have been sold to Warn­er Broth­ers. Best Friend Next Door is her first nov­el for a younger audience.