In honor of Alice Sheldon’s 100th birthday, Australia’s Twelfth Planet Press is publishing a selection of “letters to Tiptree” by an impressive list of science fiction and fantasy writers, editors, critics, and fans. Nicola Griffith’s letter also appeared last month in the Los Angeles Review of Books. Brit Mandelo’s letter has been excerpted at More on Letters to Tiptree, edited by Alisa Krasnostein and Alexandra Pierce, at the Twelfth Planet website.