Chynna is the tattoo artist who has her shop in the Flatiron Five Fitness lobby. Each month, on the full moon, Chynna gives away a special tattoo that brings true love to the recipient. Three friends from Honey Hill, Maine are the first to experience Chynna’s moon magic. Book four is Chynna’s own story.
There’s a Pinterest board for Flatiron Five Tattoo, again with subsidiary boards for the individual stories.
You can read this series without reading Flatiron Five, and vice versa. You can read the two series in order separately, one after the other – I’d read Flatiron Five first in that case.