1791-1871 1939-1945 19thcentury 20thcentury action actionandadventurefiction adventure adventureandadventurers adventurefiction adventurestories africanamericanquilts americanfiction amusements angewandtemathematik animals apl(computerprogramlanguage) archeology aventures babbage biography brothersandsisters buriedtreasure charles chiffrement(informatique) chiffrierung children'sstories christianlife codeandcipherstories codes codingtheory combinatorics communication computers computersecurity concoursetcompétitions confidentialcommunications contests cousins criptógrafos cryptographers cryptographersinfiction cryptographes cryptographie cryptography dataencryption(computerscience) dechiffrierung detectiveandmysteryfiction detectivestories einführung enigma(chiffriermaschine) etc evacuationofcivilians families familysecrets ficción fiction fictionalworks ficçãoamericana franc-macʹonnerie franc-maçonnerie freemasonry freemasonryinfiction freemasons freimaurer friendship frimurare fugitiveslaves geheimschrift general geschichte girls greatbritain guineapigs hamsters histoire historical historicalfiction history hostages humanenlightenment identity juvenilefiction juvenileliterature kidnapping kryptologi kryptologie langdon longnowmanualforcivilization man-womanrelationships maps masonería mathematics mice miscellanea mysteries mysteryanddetectivestories mysteryfiction newyorktimesbestseller newyorktimesreviewed nobility noeticscience nouvelles novela nyt:hardcover-fiction=2009-10-04 orphans readinglevel-grade10 readinglevel-grade11 readinglevel-grade12 readinglevel-grade9 robert(fictitiouscharacter) robert(personajeliterario) robert(personnagefictif) robertlangdon(fictitiouscharacter) romanasuspense romancefiction romans secrecy secretsocieties security signesetsymboles signsandsymbols sisters skönlitteratur socialaspects socialissues sociallifeandcustoms societessecretes souris spanishlanguagematerials spies spystories suspense suspensefiction symbolik sœurs theasisters(fictitiouscharacters) thriller thrillers tramps translationsintodutch translationsintogerman treasuretroves tricks twins undergroundrailroad unitedstates vacations vendetta verschworung verschwörung worldwar