Scientists make test dummies out of cats, and when they insert some special liquid in two siblings it can change them. Meet Fiona and Fianna, twins who have been tested on and their lives changed. Now switched, they have to try and find a way back to the lab and find the antidote before they become each other forever. {Concept and Cover by Whisper}

Cats from around the world have gathered together to celebrate the one month anniversary of the CatsofScience account. A hall is set up as the party venue. A long mahogany table is spread across the room, all sorts of delights sitting beautifully upon the dark wood. A large crowd of cats huddle in front of a stage where a lone tabby sits. He opens his mouth to address the eager crowd. "Cats from around the world! Thank you all for attending this wonderful event today. You'll be pleased to know that this party will be full of fun and games! To mark the one month anniversary of the CatsofScience organization, my team have worked hard to prepare and plan for this glorious gathering! "Now let us commence the first game of the night..." The crowd held their breath. "'Twinkle, Twinkle, Little Stars!'" An eruption of cheers and attempts to applaud followed. Cover by emberblazeofwindclan Concept by -SapphireSkies-

When Yellowfang discovers a time machine, there's only one thing she can do: Jump into it and hope for the best. Unfortunately for the time periods she visits, the time machine has a certain knack to sending cats into the most important battles and events in history. Only Yellowfang knows what really happens when she has to face against the past. Narrations of the chapters by Ember and Dusky! ~ Cover and concept by @awesomesauceoreos

With an amazing machine invented by the Twolegs and some headphones, cats and Twolegs are now able to communicate. This is good in so many ways--the cats get a huge leap forward in modernization, and the two species can live in peace. Take Aspenfrost, for instance: a cat with a family in Landong, a place where both cats and Twolegs live. With an Igid mate and two kittens, he's the happiest cat there could be. But no machine lasts forever, and there is no telling what amount of bloodshed will result when it fails. (Idea by Ember)

When scientists conduct an experiment to see if Warrior Cats could actually happen, they never knew what they did could have such an effect to the cats under the dome.

Sparkface can't do anything right. Even her name, requested at birth, was messed up when her mother broke into a fatal fit of coughing whilst speaking. Somehow, she always manages to crush, attack, break, or scare off anything important, and it seems as if she will never be accepted by her Clanmates. When she gets kidnapped by Twolegs after their dog attacks her, she thinks that she is doomed to never see her Clan again; however, she discovers something in the den of the Twolegs, something could change the Clans forever. Sparkface knows that if she can return to WindClan with this incredible creation, she will be hailed as a hero. Will this finally be her chance to redeem herself and change her fate? Or will she be useless, blundering Sparkface forever?

What if the Warriors universe and our universe collided--literally? Join the admins on this new view of the multiverse theory, where canon characters and the admins themselves are suddenly face-to-face. Two universes have collided--the Warriors' and our own. ~ Concept and cover by Ember ~

When the Catmint 9 ship launches into space, the rowdy crew of four is ready to explore the solar system in a mission issued by the KGIS (Kitties Go Into Space) corporation leader, Astro. But, every plan has its flaws, and it all starts with one cat in the bathroom. Then the mission just might be cut short when another astrocat is added to the roster. Can the Catmint 9 crew survive the bare plains of Mars, the scorching surface of Venus, and the minefield that makes up Jupiter? There's only one way to discover - jump aboard the Catmint 9, and for the rest, we'll just have to find out.

Bill Nye isn't a Clan cat; he's merely a loner who wanders across the cat-populated plains of Sciencelandia. But, when he stumbles upon the territories of the many Clans that live in Sciencelandia, he has a lot to learn-but so do you! ~ Cover by @WhisperSpirit, concept by @awesomesauceoreos