Billy Bat (ビリーバット) by Naoki Urasawa and Takashi Nagasaki
There are certain artists who you can assume by default create things worth looking into unless advised otherwise. One of those people is Naoki Urasawa. Pluto, Monster, 20th Century Boys, and Yawara! are all critically acclaimed series with near universal praise. So in general you can bet good money that if you see a new series by him it might be not be worth buying the whole series sight unseen but it is always worth checking out the first book especially when Takashi Nagasaki is involved as well. And his current ongoing series (alongside Master Keaton Remaster) is Billy Bat.
Billy Bat starts after World War II with a popular Japanese-American comic artist, named Kevin Yamaga, trying to discover if his smash hit comic is actually a copy of a manga he might have seen when he was in the service. He soon discovers that his Billy Bat character is not just simply a copy of an obscure manga but an ancient symbol used by a variety of dangerous secret societies. Soon the ancient conspiracy surrounding this nigh incomprehensible bat god sucks in Kevin Yamaga to a world of ninjas, faked moon landings, magic, and people like Lee Harvey Oswald and Albert Einstein.