However when you look past the amusing dialogue and set up there are several flaws. Firstly everyone seems sarcastic so hard to make people menacing. Secondly the plot is thin at points for instance how did shagging Thatcher cause dinosaurs to exist? Repetition of jokes like it's not Inception grate after a while. The book drags occasionally as there is so much dialogue and so little action with them attempting to fight the dinosaurs just once. Lastly the ending I felt was a bit of an anti-climax as makes of the story that he told seemed irrelevant and it was a bit predictable.
Overall at face value the book is amusing but a disappointment due to thin plot, repetition and too much dialogue. However when you add in the unreliable narrator element which is wrote really well the book is more interesting as there is a question of if you believe the bloke or not.