Ritual Adept is a Wizard feature gained at level 1 in the 2024 SRD. You can cast any spell as a Ritual if that spell has the Ritual tag and the spell is in your spellbook.
You can cast any spell as a Ritual if that spell has the Ritual tag and the spell is in your spellbook. You needn’t have the spell prepared, but you must read from the book to cast a spell in this way.