Project Mastodon by Clifford Simak is a thought-provoking science fiction novel that explores the ethical implications of time travel. The story follows a group of scientists who accidentally discover a way to transport living creatures back in time, leading to the creation of a prehistoric wildlife preserve. As the scientists grapple with the consequences of their actions, they must navigate the challenges of dealing with an unfamiliar world and the moral dilemmas that arise from their interactions with the ancient animals. Simak's writing is engaging and the concepts he presents are interesting, making for a captivating read that will leave readers contemplating the ethical boundaries of scientific advancement. Overall, Project Mastodon is a compelling and thought-provoking read that will appeal to fans of speculative fiction.

Book Description:
Clifford Simak deals with the implications of time travel in his own unique way in this story. What if a group of guys did it on their own, without any help from government or industry? On a shoestring,so to speak? Would anyone believe them? What would you do if you could go back 150,000 years to a time when mastodons and saber toothed tigers roamed North America? And what happens when they run out of money? All these questions are explored in the usual humorous, wry Simak way in this story.