Would it detect Spell Scrolls or Wizard Spellbooks? They don’t have active magic on them. How about a Magical sword w/ +1 property?
— Çınar Demir (@CinarDemir) April 4, 2018
A spellbook is not a magic item.
A spell scroll, a +1 weapon, and anything else in the magic item section of the "Dungeon Master's Guide" is a magic item.
Detect magic senses magic items. #DnD https://t.co/H6Gad3REi4
— Jeremy Crawford (@JeremyECrawford) April 4, 2018
So a page of a Spellbook that has Chromatic Orb on it is vastly different from a Spell scroll of Chromatic Orb.
Thank you!
— Çınar Demir (@CinarDemir) April 4, 2018
A spell scroll contains the magic needed to power the spell written on the scroll.
A spellbook doesn't contain such magic. The spellbook's wizard supplies the magic. #DnD https://t.co/ia261QXGuv
— Jeremy Crawford (@JeremyECrawford) April 4, 2018