I allude to Back to the Future in the 1985 story to let folks know it was an inspiration and because it literally was the most time-travelly bit of pop culture we had in the mid 80's. I can talk about their tools for considering change. First, the book is metafictive in a traditional sense where I'm showing and telling the reader that the act of writing and reading is a reflexive way to push boundaries of real and literal time travel. Writers and readers are time travellers. The question is what we do with that time we traveled when we leave a book, leave a page.