Glenn Gould Reader, a collection of writings by Canadian pianist Glenn Gould

Eye, Brain, Vision by David Hubel, IMO an excellent introduction to visual neuroscience for the layperson and a really, really nice example of good scientific writing

Huygens and Barrow, Newton and Hooke by VI Arnold, for the density of ideas

Perceptrons by Minsky and Papert, mainly as an example of clear mathematical exposition