"Harvey Hill's first day at Strangeville Middle School doesn't go quite as expected when he discovers it's full of various creatures and odd happenings, including a particularly nefarious supply closet"--

Cordelia Clay loves the work she and her father do together: saving and healing the remarkable creatures around Boston at the end of the nineteenth century. Their home on Cedar Street is full to the brim with dragons, squelches, and diggles, and Cordelia loves every one of them. But their work must be kept a secret, others aren't welcoming to outsiders and immigrants, so what would the people of Boston do to the creatures they call 'monsters'? One...

Eleven-and-a-half-year-old Valentina Salazar grew up as a monster protector until her father's loss, but when a video of a mythical egg appears, Valentina convinces her older brother and sister to help her find and save it--all while avoiding the monsterhunters who want to destroy it.