Congratulations, student of the Institute. You have come across the very rare and extremely heavy spellbook, The Grand Book of Spellweaving. This book contains knowledge of every single class of magic and all their spells along with sigils, runes and rituals. Peruse long enough and you may even come across some ancient and forbidden magic. Go ahead and test yourself, see if you can be the first to master this textbook. (This book will be constantly updating with each release of the Malgus series and will not contain any spoilers)