From publisher blurb:
The Wizard's Library is a collection of three 1st- and 2nd-level spellbooks for use with the Wizard's Grimoire or the Thief & the Necromancer. By studying them, unlocking their secrets, and mastering the dangers within, you can follow in the footsteps of the great and the wise!
The first spellbook is the Dictum of Polume the Farer, an easy and useful 1st-level grimoire. It includes such spells as a scampering lantern, a plasmic mirror, and plasmic hornets.
The second spellbook is the Red Tome of Salabrusto the Wise, a powerful 2nd-level grimoire. Salabrusto the Wise was a traveler between worlds, and his spellbook includes such spells as invoking a howling otherworldly wind, summoning an alien psyche, and rupturing the membrane separating the worlds.
The third spellbook is the Three Scrolls of Jorvelte Wild-Crown, a demanding 2nd-level grimoire. It instructs its student in the art of enchantment, and includes such magical creations as the salve of vertiginous assent, the charm of the sacrificial effigy, and the deadly and powerful baton of glimmering menace.
Warning
If you bring these spellbooks with you to your D&D game, I don't know what will happen.