As an ex-actuary, reading a crime series starring an ex-actuary is deliciously entertaining, and Antti Tuomainen’s hero is swollen with actuarial tropes. Henri is serious, droll, and extremely smart, and in the second book so far, “The Moose Paradox,” Henri faces escalating problems, seemingly too extreme to solve, when his no-good brother returns from the dead. But seemingly impossible does not mean impossible, and Henri is good at figuring out solutions… Peopled with outlandish characters and enriched by chuckles. The Moose Paradox easily whiles away an evening.