“After [WWII], the other Finnish artists formed themselves into political groups but Tove wasn’t a joiner; besides, the only political activity she enjoyed was tyrant-baiting. She decided to emigrate to the island kingdom of Tonga but the governor wrote back saying there was a housing shortage and she wouldn’t be welcome. So she created her own Tonga: Moominland.” A new biography looks at the “conflicted life” and creative work of Tove Jansson, whose name has appeared several times here at The Millions.