Scarlett Thomas 
PopCo 

Alice Butler has been receiving some odd messages – all anonymous, all written in code. Are they from someone at Pop Co, the profit-hungry corporation she works for? Or from Alice”s long lost father? Or has someone else been on her trail? The solution, she is sure, will involve the code-breaking skills she learned from her grandparents and the key she”s been wearing round her neck since she was ten. Pop Co is a grown-up adventure of family secrets, puzzles, big business and the power of numbers.