Several sections in WormBook grew this month with the publication of four new chapters. WormBook has further expanded its coverage of nematodes other than C. elegans this month with the addition of “Strongyloides spp.” and “Genomics and biology of the nematode Caenorhabditis. briggsae” to the Genetics and genomics section. Additionally, “C. elegans and volatile anesthetics” was added to the Disease models and drug discovery section and “Roles of chromatin factors in C. elegans development” was recently published in the Molecular biology section. In order to find out about new additions to WormBook, please sign up for email notifications or access the WormBook RSS feed.