Hertz egg
First appears in Book 2: Jack the Bodiless, chapter 7 (4 HANOVER, NEW HAMPSHIRE, EARTH 24 AUGUST 2051)
Appearances
B1
B2
B3
B4
Not yet
This first turns up in Book 2. Come back when you get there.
First appears in Book 2: Jack the Bodiless, chapter 7 (4 HANOVER, NEW HAMPSHIRE, EARTH 24 AUGUST 2051)