The Martian (An Ennin Mystery #51) by Ben Stevens is part of an ongoing series of mysteries about Ennin Sensei told from the point of view of his protege & scribe, Kukai. I gave this one almost four stars.
The Martian by Ben Stevens was about a scientist/astronomer who observed what he believed to be an invasion by Martians. He had prepared an area for people to remain protected until the invasion was over. It did not work out according to plan.
"I tried hard to hide a smile, as I listened to this fanciful nonsense. It was a shame, but this Miyazumi was a man fast coming apart from his wits--a solitary lesson never to spend too much time by one's self."
Link to purchase: http://www.amazon.com/Martian-Ennin-Mystery-51-ebook/dp/B013K411YG