Portfolio will launch Thesis, a new imprint which will publish “urgent idea-driven nonfiction by thought leaders, journalists, and experts with a strong point of view.” The first list will publish in spring 2023 with Struggle Sessions by Nellie Bowles, and future authors include activist Laila Mickelwait, journalist Matt Taibbi, “America’s government teacher” Sharon McMahon, and evolutionary psychologist Diana Fleischman. The imprint will be led by Sentinel editorial director Bria Sandford and Portfolio editor-in-chief Niki Papadopoulos. Portfolio president and publisher Adrian Zackheim will serve as publisher, and Helen Healey will rejoin the company as editor to acquire for Thesis, Sentinel, and Portfolio. […]