Twitter co-founders Evan Williams and Biz Stone have launched a new publishing platform called Medium. The entire network is built upon themed collections of text and images, giving writers more space beyond the 140-character confines of Twitter.

Here’s more about collections, from the founders:  “Collections are sometimes closed (like this one) but optionally open to contributions. For example, here’s an open collection of crazy stories. Here’s one of nostalgic photos. Collections give people context and structure to publish their own stories, photos, and ideas. By default, the highest-rated posts show up at the top, helping people get the most out of their time in this world of infinite information.”

Below, we’ve collected all the information writers need to know about this new site.

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Gillian Blake been named editor in chief of Macmillan’s Henry Holt and Company. She will report to publisher Stephen Rubin.

Blake joined Henry Holt in 2009 as executive editor, months after HarperCollins shuttered the division in a massive restructuring.

Here’s more from the release: “She recently edited the runaway bestseller STORIES I ONLY TELL MY FRIENDS by Rob Lowe. Prior to joining Holt, she held positions at Scribner, Bloomsbury and Harper Collins publishers where she edited best-selling authors Harold Bloom, Robert Sullivan, Peggy Orenstein, Steven Johnson, Russell Brand and award-winning author Adrian LeBlanc.”

Los Angeles Times book blogger Carolyn Kellogg received a personalized note from former President Bill Clinton responding to a story she wrote about his reading habits–a two-page missive that included Clinton’s current reading list.

Clinton has led a literary life, speaking to publishers and writing his bestselling memoir. His current reading list contains seven books, an eclectic mix of fiction and nonfiction.

Here’s part of Clinton’s reading list, but be sure to read the rest: “Here’s a list of books Bill Clinton has been reading lately, from his own pen: “1. Steven Johnson‘s “The Invention of Air” and “The Ghost Map,” esp. #1 2. Tom Zoellner‘s “Uranium” 3. Malcolm Gladwell‘s “Outliers,” his best book.”