Dear Colleagues: I am writing to share the news of a special issue of GENETICS on "Fitness Landscapes: data, theory, and applications to be edited by myself and Sergey Kryazhimskiy (UCSD). We encourage you to participate in this initiative and consider submitting a paper for review by March 18, 2026. More information on the special issue can be found here: https://doi.org/10.1093/genetics/iyaf206 We look forward to hearing from you and/or receiving your manuscript in the coming months. With all best wishes, David McCandlish Special Issues Editor, GENETICS Associate Professor Simons Center for Quantitative Biology Cold Spring Harbor Laboratory 1 Bungtown Road Cold Spring Harbor, NY 11724 mccandlish@cshl.edu david.mccandlish@alum.swarthmore.edu (to subscribe/unsubscribe the EvolDir send mail to golding@mcmaster.ca)