Mr. Mercedes is not done with Bill Hodges (retired detective) and his partner Holly Gibney. End of Watch is the last book in the trilogy featuring Brady Hartsfield, the Mercedes killer. He is confined to a hospital ward for people with severe brain injuries; his was the result of an "intervention" by Holly at the climax of Finders Keepers, the middle book. Although he arrives in a vegetative state, Hartsfield slowly recovers consciousness. It is never clear whether the injury improves spontaneously or whether the recovery occurs because of an experimental drug his doctor gives him. Whichever happened, Brady develops telekinesis and some other freaky mental powers. Combine this with his technical genius and Hodges and Gibney are back in a battle to save innocent, young lives.
Hodges has his health problems to contend with and Gibney, mental issues. There is plenty of plot to keep you turning the pages. Among the horrors and story twists, Steve always has a gem I think is worth remembering. Hodges (70 years old) is at "that end of his life."
If you like Stephen King, read the trilogy.
I am an avid reader and like to share some of my "finds" with others.