Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Interesting, slight change of formula here

In many ways this is a quintessential Francis novel, with a fairly normal, likeable hero put into a situation where he is subjected to physical and mental challenges. The plot here is pretty good, although somewhat far fetched. However, this novel varies from the typical successful Francis formuala by having a sexual interlude between the hero and a female supporting character quite early on in the story. This is unusual, since Francis' characters are typcially fairly chaste, but this has the addes uniqueness of having the supporting female character be an older woman who wants to experience sex and chooses the hero, barely recovered from a dangerous brush with criminal types, as her man. This is diverting mostly because it seems to me that it is so different from the norm! I was quite taken aback by this!