BEMIDJI — The Headwaters Regional Development Commission will host Minnesota author Kim Nagle for a community book launch of "Nonprofit Profitability" from 1 to 2:30 p.m. on Thursday, May 14, at 1320 Neilson Avenue SE. Nagle will present a 30-minute keynote speech and a short reading from the book. There will also be a conversation about "money, mission and sustainability" before a Q&A session and a book signing. Folks can enter to win a free co…