The series is based on the popular New York Times bestselling book series collectively known as The Expanse,  written by Daniel Abraham and Ty Franck (under the pen name James S. A. Corey). Abraham and Franck will be show producers.
A tortoiseshell cat is a coat color where the cat is a molted brown cat with black, reddish, or orange patches. They can also have white paws. Tortoiseshell cats have unique genetics. The vast majority of tortoiseshell cats are female, because two X chromosomes are required to produce black, gold and orange coloring.
A domestic cat having a coat with irregular patches of different colors, usually black and reddish-orange. 4. Any of several butterflies, chiefly of the genus Nymphalis, having wings with orange, black, and brown markings. torâ²toise-shellâ² adj.