After the falcon shifter Rayn is slightly injured during a police operation in Chicago, his friends from Wild Pride Incorporation, the international society of shapeshifters, urge him to take a few days off to fully recover. However, while Rayn had a fancy 5-star hotel with a wellness area in mind, he unexpectedly finds himself with a bear clan deep in the Rocky Mountains, living completely secluded, far from civilization, and without any comforts as people did hundreds of years ago. Normally, Rayn would have given his friends the cold shoulder and immediately returned home—if it weren't for Eden McKenzie, who fascinates him from the start. The unusual student from Bochum lives among the bears, but he is treated with disdain and regarded as an inferior errand boy, solely because he is a human and not a shifter. Until now, Rayn has only known the discrimination that shifters face from humans around the world, and he is appalled to experience the reverse situation. However, the clever Eden has his own strategy to assert himself against the stubborn bear shifters. Gravitational Waves is the second book in the Wild Pride Inc. series.