Percy Jackson and the Olympians: Legends

Monster Donut is a chain of doughnut shops across the United States. The shops are connected with the life force of the Hydra and many other monsters. This was stated by Annabeth Chase as being the reason some stores pop up so fast. This trick was discovered by some children of Hermes in the late 1950s. Another Monster Donut shop pops up somewhere every time the Hydra grows two heads (after losing one). It also seems to be magic as the shops grow out of thin air, and Tyson thought that their doughnuts were exceptionally good.