Scarlet Spellbook
Source: Arcana Unleashed - Deadfall
Wondrous Item, Rare (Requires Attunement by a Wizard)
Irregular scraps of red cloth cover this weathered tome. While attuned to this item, you can use it as a Spellbook and an Arcane Focus.
Arcane Stamina. When you use your Arcane Recovery feature, you also regain Hit Points equal to 2d6 plus half your Wizard level (round down).
Improved Spell Recall. When you use your Memorize Spell feature, you can replace an additional level 1+ Wizard spell you have prepared for your Spellcasting feature with another level 1+ spell inscribed in this book.