Physik

Physik is a fantasy novel by Angie Sage. It is the third book in the seven-book Septimus Heap series. The story focuses primarily on the 500-year-old spirit of Queen Etheldredda, who attempts to use Septimus Heap to attain immortality.

Synopsis

The book begins with Silas Heap and Gringe accidentally releasing the spirit of Queen Etheldredda from a painting that she had been trapped in for 500 years. Her release also releases her pet Aie-Aie, which causes a Sickness by biting people. Once released she sends Septimus to meet her son Marcellus Pye who drank an incomplete potion of immortality. Marcellus uses a magical mirror to send Septimus back in time to meet with a younger version of Marcellus, to attempt to complete the potion. Marcia finds a note from Septimus in Marcellus' book I Marcellus.

Jenna Heap and Nicko Heap enlist the help of Alther Mella to attempt to travel back in time to find Septimus. Alther takes them to see Alice Nettles, who happens to be housing Snorri Snorrelssen. In Alice's warehouse they find a Glass that allows them to travel back in time 500 years. Snorri, Jenna and Nicko fall through the glass, but it's shattered when Spit Fyre attempts to follow them through it. Jenna is confused for the lost princess and is taken to see Etheldredda, separating her from Snorri and Nicko. She escapes when she meets Septimus by chance at a feast thrown to honor the return of the princess.