I like all three subclasses in this UA, but Order of the Scribe is the favourite. Like many, I've got slight concerns about damage swapping ability. It might be a bit powerful, but it can lead to silly combinations (bludgeoning fireball setting things of fire, psychic shatter destroying objects, etc.). Not a fan of Manifest Mind, though. There's nothing wrong with the ability, it's just weird... your book can suddenly project an intangible floating image that you can see and hear through... and cast spells through. Also, Awakened Spellbook says "you have awakened an arcane sentience within your spellbook", but doesn't say what it actually means. Does it gain an Intelligence score? Can it reason? Can you communicate with it? These seem like the information you might require at some point in time.
One With the Word is... weird. Teleportation (up to 300 feet) is nice, but it costs an action, and is limited by your proficiency modifier (+5 at 14th level) times per day. It's a nice ribbon effect. Returning from the dead is really flavourful, but not something you're going to use on a regular basis. All in all, nice, but slightly underwhelming. Perhaps if the teleportation effect could be used as a bonus action?