He looked over his shoulder before shutting the door to the laboratory. After bolting it, he pulled the summoning book from where he had hidden it. After opening it to the bookmarked page, he began inscribing the symbols to contain infernal entity.
His teacher was a fool. He knew he was ready to control a demon. The proof, he rationalized, was how easily he had been able to steal the tome from the library and secret it in the laboratory.
He gave the circle and symbols a cursory inspection, sure that the three, detailed checks his master demanded were unnecessary.