Harpur's Creed Tetralogy(bw) Toxic Enlightenment

Harpur sets out on her own to carry out the letters' instructions from an unknown sender, leaving everyone looking for her. Allies and enemies. While Harpur is MIA, Harpur's best friends, Kailani, Anneliese and Michael, together with Roman, take command of the group. They split off into two groups: one to find Harpur which is clued to help locate stolen gifted individuals and the other to keep Orlandó safe until Harpur returns. Azaleiah, with help, has taken Harpur and unknown others hostage after Harpur followed the instructions. They will be punished if they disobey. While Harpur is being held hostage, she learns more about the Macbeths. More about their plans, as a whole or individually, and dynamics. And reasons. Who was the sender of Harpur's letters? Are these stolen brilliant folks somebody Harpur has met or heard of, or are they complete strangers? Why don't these stolen gifted people leave the Macbeths? What's keeping them there? How much longer will Harpur be alive? Most importantly, will Orlandó be safe while Harpur is abroad?