Tal's last name is Binder, and his mother's ship clan was changed to Elmheart.

On the way to Crossroads, the party fights off a Kobold attack. It shows everyone's abilities well at the start of the story.

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/817659/chapter-3-kobolds

Tal uses his magic a lot more casually through the story.

It is revealed why Tal's mother was cast out of her clan. She was given an amulet that lets sorcerers resist the Avatar's taint when they go on land, but it didn't work, so she was cast out. They didn't know what it meant, but couldn't risk her presence onboard.

Runes were removed from some places I ended up not expounding on. The baths for one. I originally planned for Tal to experiment on the runes in the bath a lot. This is also the reason the bath chapter had a long description of the room (which has been pointed out as excessive in comments and reviews, haha).

The Edgewater Arc was moved to be evenly spread throughout Book 1, instead of a large block at the start of book 2. No significant changes were made to that story.

Tal gained an ability called Willsight back when he overdosed on potions of clarity. At first, it blinded him, covering the world in a gray haze, but he soon learned to dial it in so he could see Will in the world. This functioned like a mana sight in other stories, but had limitations. When its active, it slows his casting, and extended use causes headaches. This ability allowed me to better explain a lot about magic and runes. There were lots of minor changes to the magic system. Mostly fixing inconsistencies and they aren't worth spelling out. You shouldn't have any trouble following.

The Willsight stuff is introduced in almost entirely new chapters. I'll link them below, and I suggest reading them.

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/841980/chapter-20-excrement

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/844406/chapter-21-mysteries

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/845443/chapter-22-will-poisoning

I fleshed out Tal's interactions with a baker, who now sells pretzels. It comes back up in book 2 in a few minor ways, but is not significant otherwise.

I added a Seeker and Tower Wizard interaction. This also comes up later in book 2. This is in chapter 9 below.

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/827594/chapter-9-salvation

A second ogre was added to the harpy fight as part of a move to make the battle more climactic.

The progression of Tal's air magic takes a different route, but ends up in same place as the original. I needed paced out of the advancement differently.

The interlude Mason Ants was added.

https://www.royalroad.com/fiction/chapter/862397

There is an interlude as an epilogue written by the Dahns previous inhabitants. You should just go read this, it's very short.

Link

https://www.royalroad.com/fiction/chapter/875246

Dagmar is now a female dwarf. There were a lot of reasons I decided to change this, but the biggest was that it made character interactions a lot better. There was a dynamic I was planning between Dagmar and one of Tal's companions, and it worked much better with Dagmar as a woman. Once I made the change, writing Dagmar's dialogue became much easier.

Some spells were renamed to better align with D&D. I really don't know why I changed them.

Updraft -> Slow Fall Ghost Light -> Light Light Cantrip -> Glow or Torch Arcane Armor -> Mage Armor Knit -> Mend Conjure added - Cantrip of the Font of Space Tal can summon objects on his person to his hand with lots of restrictions.

I also wrote a bonus chapter that's not directly tied to the main story. It ended up being a rough draft of a Book 2 interlude.

https://www.royalroad.com/fiction/49881/dear-spellbook-rewrite/chapter/823849/bonus-chapter-1-kordins-chronicles