A collection of 16 time-travel stories by the science fiction master originally published 1956-2007, with a 2018 introduction by the author.

"George and Harold have been turned into evil zombie nerds doomed to roam a devastated, postapocalyptic planet for all eternity! Unfortunately, the boys can't count on Captain Underpants for help because Tippy Tinkletrousers and his time-traveling hijinks prevented George and Harold from creating him in the first place! With Tippy having changed the course of human history forever, George and Harold will have to figure out a way to change it back!"...

Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers--people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan's future self, warning them about an impending disaster that threatens them and everyone they know. Will they be able to set aside their past in order to save the future?--Amazon.com

Its 1852 and cousins Patrick and Beth sail to Fiji on the HMS Calliope under the command of Captain James E. Home. They arrive at the islands to find that the Christian Fijians are at war with the non-Christian Fijians. Missionary James Calvert is trying to make peace and suggests that the captain allow peace negotiations on board the British vessel. Patrick and Beth learn about sacrificial living when they observe Calverts determination to live on...

He only looked away for a second. Still haunted by the disappearance of his little sister Amy over twenty years ago, Joseph Bridgeman's life has fallen apart. When a friend talks him into seeing hypnotherapist Alexia Finch to help with his insomnia, Joseph accidentally discovers he can time travel. His first trip only takes him back a few minutes, but his new-found ability gives him something he hasn't felt for the longest time: hope. Joseph sets...

Maddy Rose lives in two worlds. A hundred years apart. In the same strange house built as an octagon. When a mysterious black cat leads her into its unknown attic, she meets Clare and his very sick sister Eva. Together Maddy and Clare jump into a money-making scheme in his uncle's dangerous soap factory to buy a cure for Eva. But an unexpected tragedy befalls them. And then Maddy is pulled back into her own time to confront the premature birth of...

"For anyone who has ever felt stuck on the wrong path comes a stunning, time-bending love story that challenges what it means to get things "right," and who's at your side through it all What would you do if you had one more chance for the life of your dreams? Lou feels like she is stuck on the wrong path: alone, in a city far from home, watching other people be happy. When the man she's in love with announces his engagement to someone else, Lou is...

Finding refuge in the greenhouse after her mother's death, Rose investigates a strange light only to find herself transported back in time where she becomes the servant and confidante of Henry VIII's daughter Elizabeth.

"It's 1995, and Alex Dean has it all: a spot at Cambridge University next year, the love of an amazing woman named Holly and all the time in the world ahead of him. That is until a brutal encounter with a ghost from his past sees him beaten, battered and almost drowning in the Thames. He wakes the next day to find he's in a messy, derelict room he's never seen before, in grimy clothes he doesn't recognize, with no idea of how he got there. A glimpse...