Andrew Limbong writes: “More than 500 authors have signed a letter supporting members of the HarperCollins Union, who are currently on strike. The signees include HarperCollins’ own authors and those associated with other publishers, including names such as Barbara Kingsolver, Jacqueline Woodson, Kwame Alexander, and more. The letter was sent to HarperCollins Publishing CEO Brian Collins and HarperCollins Children’s Books President Suzanne Murphy on Thursday morning. Union members at HarperCollins, one of the biggest publishers in the country, have been on strike since November 10, and have been working without a contract since April.”