A conversation on Twitter evolved into a movement, We Need Diverse Books. That was in 2014. We thought it was time to learn more. With the support of Baker & Taylor, School Library Journal (SLJ) has launched a survey about children’s and young adult book collections in school and public libraries—we want to know how diverse titles are being selected and acquired in these institutions, where there are gaps in collections, and how popular the books are with library users. “For the purposes of this survey,” states a letter that accompanied the link to the instrument, which went live Friday, “‘diverse collections’ refers to books with protagonists and experiences involving under-represented ethnicities, disabilities, cultural or religious backgrounds, gender nonconformity, or LGBTQIA+ orientations.” The survey closes May 11. We will share the results in a fall issue of SLJ.