@Book{OL6886833M,
    title: {Sharpe's triumph},
    author: {Bernard Cornwell},
    publisher: {HarperCollins Pub.},
    year: {1998},
    place: {New York},
}

@Book{OL23271573M,
    title: {The codex},
    author: {Douglas Preston},
    publisher: {Forge},
    year: {2004},
    place: {New York},
}

@Author{OL39115A,
    name: {Douglas Preston},
    birth_date: {31 May 1956}
}