At first, Theo and Beau were just two new friends who liked to snuggle up together at naptime.

Before too long, though, the rescue puppy and his toddler brother were stars of the (very) small screen, with photos of their daily dream-sessions charming their mom's Instagram followers. Then, they became a viral sensation here, there and everywhere -- and those Instagram photos went from collecting hundreds of likes to tens of thousands with fans anxiously awaiting new snaps. Now, they're bringing their naptime love story to the printed page.

Momma's Gone City blogger Jessica Shyba has signed a deal with Feiwel & Friends for two books featuring the duo. Bedtime for Theo and Beau, the first of the two volumes, is set to be published on February 4, 2015 -- and according to the publisher, the Santa Cruz SPCA, through which Shyba's family found Theo, will be involved with the project.

Jean Feiwel, senior vice president and director of the Macmillan Children's Publishing Group (of which Feiwel & Friends is an imprint), called the photos "irresistible."

But of course, if you are one of Shyba's 230,00 (and counting) fans, you already know that. And if you haven't been privy to the cuteness yet, please allow us the pleasure of introducing you with some of the latest scenes from @MommasGoneCity...

For more, see HuffPost Parent's original story about Theo and Beau here, and our second installment here.

Also on HuffPost:

Loading Slideshow...
  • Emmy and Zoe

  • Della and Sully

  • Jackson and Mickey

    The love between this dog and this boy is as pure as pure love comes! Jackson and Mickey Dog. Best friends forever!!!!!

  • Julia and Dad

    These two pictures are of our daughter Julia (9 months old) "talking" to her Daddy over Skype while he was deployed to Afghanistan.

  • Gavin and Riana

    It was taken two years ago by our friend. It was actually not planned and she just caught the shot as I was stealing a kiss.

  • Talya and Sam

    Love at first sight! This was taken 2 days after she was born.

  • Melina and Avi

    This photo is from September 2010. I had just shaved my head for St. Baldricks in honor of my son Levi, pictured. He was diagnosed with stage 4 brain cancer (Medulloblastoma) in 2004 when he was only four. Surgery to remove the tumor left him mute, paralyzed and incontinent. He relearned all his life skills while undergoing multiple surgeries, chemotherapy and intense radiation. He is my hero.

  • This photo is at our wedding day, our daughter ran up to be with us at the alter.

  • Angie Ray

    My 6 year old Lucie with her then 5-days new little brother Eliot. Her expression was not posed, I had wanted her to look at the camera but he did a little sigh in his sleep and she said “aww” and turned her head towards him and closed her eyes. I teared up as I clicked the shutter, so magical.

  • Baby brother's first haircut

  • Julia and Chloe

  • Evan and Lexi

  • Logan, Marci and Lily

  • This is my definition of love. Sister love.

  • Nathan and Danielle

  • Emerson, Savannah and Tanya

    Here are my two "everythings"-kissing me!!!

  • My 9 yo and Kira. A rescue from the Austin Humane Society.

  • Samantha, Lucy, Parker and Simon

    Taken at the homebirth of my daughter, Lucy Nova, on 1/9/09 with her brothers Parker and Simon present and eager.

  • This is my son and his new born baby sister

  • Petra and Ivan

    The attached photo is of my 3-year-old twins, Petra and Ivan. They're both on the autism spectrum, but Ivan's powers of speech are far more advanced than Petra's, and on some level he seems to know this. He makes sure she's not overlooked when we're doing family things, and occasionally takes her hand to walk with her when we're out. If she pulls away he reaches out to grab her hand again, to make sure she doesn't get left behind!

  • Joanna and Luke

    This is a picture I took of my son and daughter while hiking.

  • Brothers and sister through adoption.

  • Carly and Brooklyn

    Carly helps little sister Brooklyn enjoy a lollipop. Brooklyn has a gross motor disability (Rett Syndrome) so she can't use her hands purposefully.

  • Riley and Benjamin

  • This picture was taken one Sunday afternoon when we were leaving Church. My daughter had been getting upset during the Mass because she was missing her Auntie who had passed away earlier that year from cancer. She told her brother how she was feeling as they were leaving. He put his arm around her, hugged her and kissed her forehead telling her that everthing was going to be alright. As they walked the remainder of the way to our car, they held hands. It was so precious. They did this all on their own. This is the true definition of sibling love at it's finest! I just walked quietly behind soaking it all in. (And of course taking a picture like any good mom would :)

  • JJ, Mr. Teddy, Jeter and Minnie

    JJ (boy) Mr. Teddy (the white butt) Jeter (the orange cat) Minnie (the kitten) We just had to put Jeter to sleep yesterday after 15 years of warmth and sweetness :'(

  • Holli and Chelsea

    This is me and my daughter, Chelsea. If I ever doubt that I am loved, this picture reminds me otherwise.

  • This is a picture of my then 16 year old son and his 12 year old sister about 6 weeks after she was diagnosed with a terminal brain tumor. It is the first day of school and I think it's easy to see the tragic love he feels. Hope Alizah Kimlee Fuller 6/26/97 born 7/29/09 diagnosed with DIPG 3/10/10 died

  • My sons... love how affectionate they are with each other.

  • Aiden and Ryan

    Aiden gets wrestling tips from his big brother, Ryan

  • Emily and Elliot

    This is a picture of my son, Elliot and I on his first birthday. He had just finished digging into his birthday cake and I was giving him a drink of water. We have a really special connection. I'm a single mom and he is the best thing that ever happened to me. Love!!

  • Caught this picture of my husband and (at the time) 2mo old son catching a cat nap. Look at the smile of pure satisfaction (love) on my son's face. Neither would have wanted to be any other place in the entire world.

  • Ben and Lucy

  • Elias and Jackson

    Big brother (Elias - 2.5 yo) meeting baby brother (Jackson - 1 day old) for the first time.

  • Love is the first of many a newborn will take...first steps...

  • The moment I met my twins.

  • Angela and Dad

    This image was taken moments after mom, who had been looking on, had *that moment* - that moment when you realize your entire world has changed – that moment as a new mother that takes your breath away. Her eyes filled with tears of overwhelming joy and love and got both of us, the dna photographers, and the daddy to well up – the only one not crying was the 8 day old little angel in daddy’s arms.