Some of our favorite authors are out with new novels this month, just in time for the beginning of beach season. The Da Vinci Code‘s Dan Brown is taking on Dante’s Inferno, while the author of The Kite Runner and A Thousand Splendid Suns is back with a book that travels from San Francisco to Kabul. There are also a number of promising memoirs and nonfiction titles out this month. Click through to find out what we’re adding to our reading list.

April 4, 1968, was a tragic day in America, as civil rights leader Martin Luther King Jr. was assassinated in Memphis. TN. On this week’s episode of Mad Men, we witness the historical event from the perspective of the mostly white upper-class employees of Sterling Cooper Draper Pryce.

From the wedding for the future emperor of Japan in 1924 to Grace Kelly’s Monaco spectacular in 1956 to Will and Kate’s big day on April 29, 2011, here is a guide to the world’s royal weddings over the years.

The season-six premiere of Mad Men found Don Draper ringing in 1968 in bed with his neighbor’s wife, Roger Sterling mourning the death of his mother, and Betty Draper showing off a darker side. Any inevitable upheaval in the characters’ personal lives will also be set against a very tumultuous year. The escalation of the Vietnam War, the assassination of MLK and RFK, and feminist and student protest all went down in 1968. As we anticipate seeing this play out on Mad Men, let’s take a look at the major political and pop culture moments of 1968 that will help you spot the references this season.

Girl Rising is a beautiful film about the power of educating girls. After gaining momentum with on-demand screenings organized through the website Gathr, it was picked up by Regal Cinemas. Beginning today, it will be available in 150 theaters across the country for a one-week engagement. Girl Rising is not a documentary, nor fiction, but rather a powerful piece of storytelling that follows nine real girls, each of whom has overcome common barriers to education. The filmmakers asked award-winning writers to each create a vignette about the girl from her own country. Those stories were then used as the screenplay and are narrated by famous actresses. And in the film, each girl, not a professional, acts out her own story. Watch now to find out more.

A half-sibling for Sally Draper? Not quite yet. In episode three of Mad Men season six, we find out that Megan Draper had a miscarriage after accidentally becoming pregnant. Megan explains she was careless with taking her pill while on vacation in Hawaii, in part due to the time change. Once she confesses the unintended pregnancy to Don, they have a family-planning conversation that would not seem out of place today. Thanks to the pill, which came out in 1960, married couples could time their families like never before, and women like Megan could continue to pursue a career after walking down the aisle — so long as they remembered to take it.

Will she or won’t she? Only five months since the last presidential election, Democratic strategists and donors are dying to know if Hillary Clinton will make a second run at becoming America’s first female president. The New York Times reported last weekend that the former secretary of state has set up a “transition office” in DC staffed by about six people. But political spectators don’t know what she plans to transition to exactly, and that’s keeping her potential supporters — and opponents — unsure of what to do next.

Michelle and Barack Obama’s new Vogue interview proves they’re just as cool as you probably suspected. In the April issue, which features the first lady looking vibrant on the cover wearing a midnight-blue Reed Krakoff sleeveless dress, the Obamas joke about hitting the clubs, quote Beyoncé, and share how they approach their marriage with teamwork.

After a national study found that one in five Americans reports having no religious affiliation, sociologists at UC Berkeley decided to offer up some explanations. Mike Hout and Claude Fischer analyzed the data and found that across a nationally representative sample, 20 percent of Americans state they identify with no organized religion, compared to eight percent in 1990. And they discovered differences among demographics.

Word on the street is Kate Moss will cover Playboy‘s 60th anniversary issue. Is Playboy the new Vogue? Kate has posed nude before for high-fashion editorials, but you’ll have to wait a while to see the Playboy version. The reported cover won’t come out until January 2014. Kate wouldn’t be the only high-profile star to strip for Hugh Hefner. Actresses including Sharon Stone, Shannen Doherty, and Drew Barrymore have posed forPlayboy, as have reality stars Heidi Montag andKim Kardashian. See 16 famous women and theirPlayboy covers now.