Time Flies: Book 4 of the 'It Was a Dark and Stormy Night' Series

The world of 1493 was not ready for flying machines. Time-travellers needed to persuade Leonardo da Vinci. He agreed, but we ended up not only helping him to complete one, but then go with him on its first flight.
As if that wasn't enough, we also solved two mysteries:
• What happened on the Mary Celeste?
• Who exactly was Mona Lisa?
'Time Flies' is book 4 of the short story series in which the author travels through time as a Time Agency Chronoclasm Organisation (TACO) agent to resolve paradoxes which would lead to undesirable 'timeverses' being formed.