Context:

Beth Shapiro's book about de-extinction is discussed multiple times throughout the conversation. The subtitle is mentioned as 'The Science of de Extinction' (or similar). She discusses various alternative subtitle suggestions and the book's focus on the technological, ethical, and ecological considerations of bringing extinct species back to life. The book is referenced both in the middle of the conversation during mammoth cloning discussions and at the end as a resource for listeners.

Context:

Michael Crichton's book (implied to be Jurassic Park, though not explicitly titled) is referenced in the context of ancient DNA and amber preservation. Beth Shapiro mentions that 'Michael Crichton, when he wrote his book actually wrote in the acknowledgments that he was grateful to the Extinct Species Working Group at UC Berkeley' and that discussions about ancient DNA inspired him. The conversation then discusses how the book/movie inspired scientists to try recovering DNA from insects in amber.