Symbiosis is a great followup to Escaping Exodus.  It has more humor, more sexual situations with sexual fluidity (not explicit), challenging of traditions (gender roles, marriage, procreation, conservation, environmental protection, and ethics). Lot of political intrigue. I think the main characters are a bit immature and set themselves up for drama. I think the book was paced well for the most part, then the ending was rushed a bit. Book is a great depiction of how we as a people need to take care of and live in harmony with our environment. Our inherent selfishness will always get in the way. Great story, told in a unique way.