Physics can be divided into roughly two subdisciplines: Newtonian physics—dealing with the behavior of mostly observable everyday phenomena, and subatomic physics, dealing with the small stuff best handled by the specialists.
“The Physics Book” does a bang-up job of explaining both realms, their history, their interaction, the meaning they have for our lives, and the latest research in the fields. “Latest” is quite subjective in a field (the subatomic) where each day the experts seem to discover something new and seemingly contradicting yesterday’s wisdom. But the imprecision can hardly be blamed on the scientists, as—when you get down to it—they are investigating the very Urstoff of our universe.
An ancient Greek (I forget who) once asserted that the Earth rested on a turtle, which kept it from falling through space. Space has no up or down, or any kind of real orientation (see “Ender’s Game”) but this wise man couldn’t know that. When his student asked him what’s below the turtle, and the turtle below that, the teacher finally snapped and said, “It’s turtles all the way down!”
Those dealing with the subatomic realm are ultimately trying to find the very essence of whatever is beneath that turtle on the bottom. This is a very hard job, and requires understanding concepts like charm, spin, gluons, entanglement, fermions, and using math that could make your head spin (or charm, or entangle.)
There’s no hope of me understanding this stuff, but for the interaction of matter and things like speed and velocity and gravity, the descriptions here work fine. As with every other book in the “Big Ideas Simply Explained” series, there are sidebars with little biographical tidbits and explanations, along with charts, diagrams, and images galore. That’s always important, to have some visual referents for the material—even for the nonvisual, linguistically inclined, like yours truly.
Highest recommendation, for the layperson or the precocious young physicist. Those who have the subject down pat may still find it a handy reference book when a name or date or chronological stage in the history is needed, at hand. I imagine it would be especially convenient for teachers.