Memoirs of Heldr

 is a book and quest item in.

Acquisition

 * Found in the bookcase just to the left of the lectern where you place Bekarna's Depleted Grimoire to infuse it with starlight.
 * The blue highlight can be a bit difficult to see, due to the blue and purple ambient lighting in the room.

Uses

 * Used together with Heldr's Horn to reveal Heldr's Inheritance.
 * Put it on the Lectern of Obfuscation in the Scriptorium to activate one half of Heldr's Inheritance.
 * Needed as part of the achievement One of Them.