Do you know any book which has spells like Harry Potter series?

The Inheritance Cycle (starts with Eragon) as similar spells. The words are usually spoken and result in magic, though the magic can be preformed silently (it is more difficult). Like harry potter, many can do magic, some better than others, but most people have no talent in that area, or are even unaware it exists. Very good series--its filled with action, magic and a very good plot. One of my favorites, but don't judge it based on the movie, which is terrible. Hope you enjoy it!