Money is bad. That polemic resides at the heart of Caletti’s latest and overwhelms almost everything else. Eighteen-year-old Indigo Skye is a devoted waitress with no further aspirations and a too-mature voice that sometimes contradicts her stated lack of worldly experience; discourses on topics such as shopping for fulfillment and “airport time” sadly sound like adult intrusions (although they make for delightful reading). When Indigo receives a 2.5-million dollar tip, she turns into a spoiled brat who spends wildly, accuses her long-standing boyfriend of wanting nothing but her money and turns her back on the motley crew of diner patrons who are her extended family. Ultimately, Indigo learns to be rich and responsible (after a fling with the darker side of wealth), ensuring that readers are left with a clear sense of the moral rocks beneath the novel’s ground. Despite myriad flaws, Caletti’s fans will doubtless embrace this, even if the story is swallowed by the message with a capital M. (Fiction. YA)