Forever Love

When Kelly and Austin finally find themselves alone together over the Fourth of July, their budding romance is put to the ultimate test as a deadly threat from 1911 follows them home — trapping one of their own inside the haunted halls of the Stanley Hotel.

Forever Love is Book #4 in the Time Shifters YA series by Bob Kat, and it's the book where Kelly and Austin's relationship finally takes center stage.

With Scott and Zoey away on family vacations, Kelly and Austin are left alone for the first time. They spend the Fourth of July together and grow closer than ever, deepening the romantic tension that has been building since the very first book. 

The bulk of the story carries the teens back to 1911, where they travel to the famous Stanley Hotel in Colorado to save a four-year-old girl named Emma, whose ghostly voice has been calling out for help. 

But the mission doesn't go as planned. They face their first real defeat when the same dark force threatening Emma turns on the teens themselves, and one of their own is captured in a killer's web — putting the entire group in danger of becoming permanent ghostly residents of the Stanley Hotel. 

The book raises the emotional stakes significantly for the series, finally delivering on the slow-burn Austin-and-Kelly romance while wrapping the love story around a genuinely chilling ghost-mystery set against one of America's most legendary haunted locations.