Cryptanalysis and three-quarter view

and three-quarter view

square and square roots

with both hieroglyphs and translation

Voted by the British Crime Writers’ Association as the best crime novel ever written — and said to be Christie’s favorite of her novels — it is the third book following detective Hercule Poirot

and his insights are clear and valuable

Cryptanalysis and three-quarter viewGaines's Cryptanalysis (formerly published as Elementary Cryptanalysis) is a standard elementary and intermediate text for persons seriously interested in modern science methods for enciphering and deciphering cryptograms. It does not simply repeat older material, but contains much about modern cryptanalysis that is not generally known except to experts. It is especially strong in modern forms of cipher solution. This clear and thorough text also