Multi-Class Wizard

[Jrandom]

Is there anything stopping a wizard who has levels in Eldritch Knight or Arcane Trickster from scribing his spells he learned from those classes into his spellbook? From what I have read on the spellbook sidebar in the PHB, it looks legit.

[Sir cryosin]

No there isn't any wrong with that you could just use the same book. I don't have my P.H.B on me but don't both EK and AT get a spell book to keep the spells they know in?

[bid]

That would mean that on most EK level you could add 2 spells to your wizard's spellbook. Same as when you gain a wizard level. I don't think it's broken.

And no, only wizards have a book.