Absolutely funny! I really like JL humour. It is like funny without trying to be funny. 
 For example, Nick asks Perry to eat. Perry plays with his food and says "I can't eat when I'm nervous". Unimpressed, Nick says: "You are always nervous. You need to replenish your nervous energy". Perry nods and eats a bit more. 
 The book is full of that. The relationship between the two men is absolutely adorable! They could not be more different, and it seems like they share the same humour. it is a delight to see them interact. 
 I also like the fact that even though in JL stories one hero is sometimes physically weaker than the other, they always have an equal relationship, respect for each other. Here Perry is some tough skinny guy, be warned!