"Midshipman Fuzzball" is the first book in a YA space opera/milspec (is there a milspec subgenre for naval stories?) series about a Sentient Citizen cat serving in the Tellurian Federation Space Navy, in the Tellurian Diaspora, where the space ships have sails, and an adventure waits in every kiron. Felix Lafitte is the only Sentient Citizen cat in all the Tellurian Federation, maybe all the Diaspora. And he's always wanted to go to space on the great flow-pressure sail ships - not as a mascot, but as a crew member. Maybe, someday, as a Captain and a Leader of Beings.