Go to court magicians in major cities, such as Farenga and Dongbao Library in Xueman Xiao Long Palace. It's just that skill books are a little expensive. Novices are not advised to buy advanced spell books, which are not only expensive but also consume a lot of magic.
I remember that permanent summoning is a two-handed spell, which took more than 500 spells and was a master. It's quite easy to brush things from a distance. It's amazing to practice a few more times.