We've Been Here Before
This novel tackles the "Freaky Friday" element well enough and goes at it in a less predictable way than those before it, but it still feels like I've read this book/seen this film. The writing is good, but simple, and the characters seem to be written well. This wasn't for me, but I think if the trope of waking up as a younger you isn't something you've checked out on that you might like it well enough.