*They are mainly written in Abyssal and Draconic, with one in Common. The ones he can read are treatises on the Abyss and Demon Summoning. The one in Common is entitled 'Demonology for Dummies', one in Draconic is actually about Conjuration and not just Demonology, and the only one of the bunch that isn't about Conjuration at all, also in Draconic, is 'How to guard your lair like an Archmage on an apprentice's budget--Traps, Spells, and Tricks of the Trade'*