How hard can it be to be bad? When a morning of “bad choices” finds Bean sent outside, she sees pal Ivy standing with outstretched arms. Why? Inspired by an image of St. Francis, she is trying to be “pure of heart” in the hopes of luring birds and maybe even a wolf. When standing still and thinking nice thoughts doesn’t do the trick, though, the two hatch a scheme bound to succeed: Bean will be as bad as she can be, and Ivy will reform her. Readers familiar with the redoubtable pair (Ivy + Bean Take Care of the Babysitter, 2008, etc.) will not be surprised to find that the plan gets off to a bumpy start (when Bean screams “BRA!” killjoy Dino just declares it “boring,” not bad) but then moves thrillingly into unimagined, escalating realms of badness. Barrows and Blackall deliver another laugh-out-loud Pancake Court romp that derives its humor from the very believable characters and chemistry of the neighborhood children. Any child who’s had to suffer a time-out will relate to this one. (Fiction. 6-10)