The parallel realities series is a grouping of books and novellas about alternate worlds. In some cases a character may go back in time to deliberately change things such as in "Your Mission is to Go Back in Time and Kill Saint Paul on Malta" or perhaps a situation may arise where a man or a woman is pushed into an alternate reality which they didn't choose and definitely don't want. In other cases such as "Jumpers Between Worlds" then the characters in the book have the ability to move between worlds and in worlds such as this there can be terrifying entities such as Dream Catchers who can destroy you in your sleep.
Step into these worlds with the characters and see if you like the realities that unfold. Some of the books will be free and I hope you will find all of them stimulating.