The Golems eye by Jonathan Stroud

The Bartimaeus Trilogy

The Golem's Eye

by Jonathan Stroud

Nathaneil breaks his promise of never again summoning Bartimaeus, only three years after their small adventure. Now high up in the government, Nathaniel needs help to impress the officials and get a higher rank. As he struggles to reach the top, a young girl named Kitty Jones joins the picture. She, being immune to magic, is a commoner with a cause, and a deep hatred for magicians. When the two humans meet, it's destined to be exciting.

Not my favorite series, but definitely not one of the worst.

Bartimaeus Trilogy Ptolemy's Gate -by Jonathan Stroud

Bartimaeus Trilogy

Ptolemy's gate

by Jonathan Stroud

Nathaniel has been working poor Bartimaeus to the bone, and being tired, the djinni begins to lose his touch. Hidden in the city, someone else is working hard as well. Kitty, believed to be dead, has been training and is slowly working out a master plan. As the strings draw together, you'll want to see the epic end. Not one for my favorites, but still a very good book!