I am truly sorry for the kids who have to endure that; "Electricity is a mystery. No one has ever observed it or heard it or felt it ... We cannot even say where electricity comes from."
There must be something more in the book which brought you to criticize the rather correct ttempt to say that we STILL can not explain what Energy actually is, beyond saying that "It is that entity that makes things move," or hardly any better, "Energy is the ability to do work."
Focusing on just the one form of the seven different forms of Energy is less than desirable, but the writer's point is valid.
And, what we do KNOW about energy is that The Law of Conservation tells us that the material Universe appeared when whatever this Energy may be trasformed itself into the material Universe.
So, in a sense, this thing we call Energy IS the creator of the Cosmos and IS the Cosmos, transcending and interpentrating it, however, i.e.; panentheism.