At the moment i have received a bug as to when i buy the Curtana Sword Book of Parry, it automatically Destroyed itself upon purchase. The sequence of everything i did was as followed.

Finished Book of Skyfall(+Vitality) Went to book merchant and disposed of old book, showing book of Skyfall was destroyed in chat. Went over and selected books of swords, selected Book of Earth (+parry). all at once the mssge in the text was "You have purchased book of Earth (+parry). The book has crumbled into dust." There was no follow up touching of buttons i only purchased it and then entered the dungeon Breyflox right after I hit the purchase button.