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We review the first of this year’s nominees for the Book of the Year

Computational proofs, AI music and embarrassing surveys feature in the autumn 2019 issue. Plus all your favourite puzzles & columns.

Each time you eat a croissant you might be biting more than 500 layers of dough!

Here is the reason why the golden era of Twitter is gone

Hyperbolic surfaces, Klein bottles and more

Teaching a bunch of matchboxes how to play tic-tac-toe