Margaret Hyde has the ability to discuss new developments in science simply and interestingly so that a little information is conveyed and also, what is more important, curiosity is aroused so that a brighter student will go on to more detailed study….

[In "Molecules Today and Tomorrow," the] introductory chapter defining molecules presumes rather too much knowledge on the reader's part, and we are afraid many will read the book thinking of molecules as somehow indistinguishable from microorganisms. However, after this, the exposition is more carefully developed, emphasizing the constant motion of molecules (with experiments to demonstrate this) and the amazing discoveries resulting from the slowing of their motion when the temperature nears absolute zero or when molecules exist at different energy levels (giving good comments on the new inventions of masers and lasers with their enormous amplifying powers).