This book gave some great insights into religious, and personal choices of Earthlings, but many anecdotes were superfluous in the sense that they added absolutely nothing to the story. For this reason, I have not rated The Sirens of Titan as highly as I rated Vonnegut's Cat's Cradle. 
 I feel like this is a challenging read in the sense that some of the humour is hard to access, but is worth it. It is also challenging in the sense that the metaphors are not really obvious. 
 Even though I only rated this book a 2, I would say that this is a definite one time read for everybody