The first issue of the new Peanuts comic book hits comic shops in North America today, so use the Comic Shop Locator to find a store near you, and call ahead to see if they’re carrying this book (not every store will). And if you’re lucky, you may be able to buy the rarer cover showing Charlie Brown’s first appearance. (There’s another variant cover, but I think that will first be available at the Emerald City Comic Convention at the end of March.)
Here’s the first few pages, click each to enlarge. (The comic has two stories, some strips, and a how-to-draw-Charlie Brown feature.)
Of course, you could just preorder the book collection, which will save you a few bucks over buying four issues at $3.99 each.