The discovery of the structure of DNA, the unique code that shapes human genes was made by Francis Crick and James Watson. The Double Helix reveals the excitement of the Nobel Prizewinning Crick and Watson as they beat Linus Pauling to the solution of one of the enigmas of science. Penguin Readers are simplified texts designed in association with Longman, the world famous educational publisher, to provide a step-by-step approach to the joys of reading for pleasure.

Each book has an introduction and extensive activity material. They are published at seven levels from Easystarts (200 words) to Advanced (3000 words).