Four best friends start a party-planning business in this fresh, funny tween novel from the authors of At Your Service and Breaking the Ice . Twelve-year-old Sadie loves helping her mom with her wedding planning business, and with Sadie’s mad organizational skills, she’s a natural! That’s why it’s so devastating when her mother “fires” her after a Little Mermaid –themed wedding goes awry. Enter Sadie’s best friends: sporty Vi, ace student Lauren, and boy-crazy Becca. The girls decide that in order to get Sadie’s mom to reconsider, they have to make her see how amazing Sadie is at party planning. Except no one’s gonna hire a twelve-year-old to plan a wedding. A birthday party, though? Definite possibility. Before long, RSVP—your one-stop shop for the most creative parties in town—is born. Of course, Sadie can’t wait to prove herself to her mom, but the other girls also have their reasons for enlisting: Vi has her eye on the perfect gift for her hardworking dad, and Becca’s all aflush at the thought of connecting with Ryan, the new Irish cutie in town. And though Lauren thinks she’s too busy with summer studies to “officially” join, she’s willing to help out in any way she can. But in this particular party-planning business, nothing goes according to plan! Sadie’s mom is a perpetual no-show, Vi’s archrival is dead set on ruining her summer, Becca can’t seem to get Ryan to glance in her direction, and Lauren keeps choosing studying over her friends. Is the girls’ friendship strong enough to survive a business? Or does RSVP spell the end of these BFFs? Jen Malone is a former Hollywood publicist who once spent a year traveling the world solo, met her husband on the highway (literally), and went into labor with her identical twins while on a rock star’s tour bus. These days she saves the drama for her books. Jen is also the author of the middle grade novels At Your Service and The Art of the Swap , coauthor of the You’re Invited series, and wrote the YA novels Map to the Stars and Wanderlost . You can visit her online at JenMaloneWrites.com. Gail Nall lives in Louisville, Kentucky, with her family and more cats than necessary. She once drove a Zamboni, has camped in the snow in June, and almost got trampled in Paris. Gail is the author of the middle grade novel Breaking the Ice , the coauthor of You’re Invited and You’re Invited Too , and the author of the young adult novel Exit Stage Left . You can find her online at GailNall.com and on Twitter as @GaileCN. You’re Invited Sadie TODAY’S TO-DO LIST: ¦ sync watch with Mom’s ¦ buy seasick medicine ¦ pack backup bridesmaid dresses When I peer over the boat railing, it’s not like I actually expect mermaids and mermen to be bobbing in the ocean below me. Buuuuuut then again, I wouldn’t put anything past my mom. If her client wants a Little Mermaid wedding, her client gets a Little Mermaid wedding, no detail spared. My pocket buzzes and I slide my phone out. Plz check on photog. Thx. I weave my way through the rows of chairs sliding back and forth on the deck. The one thing Mom doesn’t control on wedding days is the weather, and today isn’t exactly offering ideal sailing conditions. I hope the bride has less wobbly legs than Ariel. “Excuse me, sir, um, are you okay?” I ask a man hanging over the boat’s side. The three cameras hanging from his neck smack against his back as he straightens. Uh-oh. He does not look so hot. He mumbles something under his breath and I shake my head. “Sorry. I didn’t catch that. Would you mind repeating?” I ask, using my most polite voice. Mom’s trained me well. He stares at me for a second, then screams, “I SAID I’M A LITTLE SEASICK!” Okay, so “please repeat” does not mean “scream at your highest possible volume,” but I’m kind of used to the vendors treating me differently. They think just because I’m only twelve, I’m not capable of the same things a normal wedding coordinator’s assistant is. They would be wrong. I plant my feet hip-width apart for balance and get straight to business. “I have a seasick bracelet you can wear on your wrist, and if you give me five minutes, I can grab some of the motion-sickness medicine I packed in my emergency kit. I also have a little sister who’s a pretty decent photographer, if you’re okay with her using one of your cameras. She could stand at the railing and grab the shots of the bride arriving by dinghy while you wait for the medicine to kick in.” His face was already turning green when I mentioned the dinghy, but he adds a look of horror to that. “I can’t allow a child to photograph this wedding!” I consider telling him kids can do lots of stuff every bit as well as any grown-up, but then the boat rolls over a large swell, and with the way he clutches at his stomach, I don’t have the heart. Between sucking in big breaths of fresh air, he says, “My assistant will take all the important shots of the bridal party. Tell your sister she can help by