Three boys, the kings of the school. One cynical newcomer. An outrageous competition.   When Mika Niles overhears the details of "The Book of Firsts" she’s at first bemused, then scornful, then intrigued. Judging which of three very handsome young men is best at kissing, and…? With no time in her final year for serious attachments, a series of lunchtime trysts is more than tempting – and an opportunity like this might never come her way again. But this light-hearted game is also a scandalous secret, and few can play with fire and walk away unscathed