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The fascination of science
The Double Helix: A Personal Account of the Discovery of the Structure of DNAThe Double Helix: A Personal Account of the Discovery of the Structure of DNA by James Watson
Buy used from: £21.86
Rip-roaring tale of girls, parties and nucleotides. Watson's views about women are weird, but he tells a great story and he is after all a genius
Mathematics: The New Golden Age (Penguin Science)Mathematics: The New Golden Age (Penguin Science) by Keith Devlin
Buy used from: £4.89
All that's happening in contemporary maths, made understandable
The Selfish Gene: 30th Anniversary editionThe Selfish Gene: 30th Anniversary edition by Richard Dawkins
Buy new: £5.76 / Used from: £3.89
Extremely readable and also a serious contribution to science
Relativity: The Special and the General Theory (Penguin Classics)Relativity: The Special and the General Theory (Penguin Classics) by Albert Einstein
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You may as well have it explained to you by the chairman of the board
Nature's Building Blocks: An A-Z Guide to the ElementsNature's Building Blocks: An A-Z Guide to the Elements by John Emsley
Buy new: £8.43 / Used from: £7.24
What the elements are and what they do. Hours of fascinating browsing
The Character of Physical Law (Penguin Press Science)The Character of Physical Law (Penguin Press Science) by Richard P Feynman
Buy new: £6.47 / Used from: £1.45
Feynman at his most engaging, talking for the general public about why stuff happens
The Principles of Psychology: Volume 1The Principles of Psychology: Volume 1 by William James
Buy new: £12.54 / Used from: £7.92
Once a standard textbook, now chiefly just a great read, but he's a lot more lucid than his brother Henry. Don't forget volume 2
The Complete Psychological Works of Sigmund Freud: "The Interpretaion of Dreams", Pt.1 v. 4The Complete Psychological Works of Sigmund Freud: "The Interpretaion of Dreams", Pt.1 v. 4 by Sigmund Freud
Buy new: £8.35 / Used from: £4.50
I don't know if psychoanalysis is exactly a science, but this is still fascinating. Again, you'll need volume 2
On Nature and LanguageOn Nature and Language by Noam Chomsky
Buy new: £12.91 / Used from: £2.50
Some of the most recent thoughts of the man who practically invented modern linguistics. He's changed his mind a lot so keep an eye out for updates
The Blank Slate: The Modern Denial of Human Nature (Penguin Press Science)The Blank Slate: The Modern Denial of Human Nature (Penguin Press Science) by Steven Pinker
Buy new: £6.59 / Used from: £4.69
Much of the best work of Pinker. A valuable counter-argument to fashionable pseudoscience, but he does go wildly astray when he starts talking about art
The Origin of Species by Means of Natural Selection: Or the Preservation of Favoured Races in the Struggle for Life (English Library)The Origin of Species by Means of Natural Selection: Or the Preservation of Favoured Races in the Struggle for Life (English Library) by Charles Darwin
Buy new: £5.99 / Used from: £2.15
Endlessly interesting and very lucid