The Cydonian Pyramid is the second book in the Klaatu Diskos series. Tucker is back and is wandering around... the North Pole? He has jumped through the maggot and ended up in the North Pole. He has no idea why he is there until a sub emerges. He is taken on board and is questioned by the doctor. He tells his story in the girl's point of veiw, the girl who saves his life. Tucker tells the story of their exciting past, and maybe even their near future.
This book added a lot more drama to the storyline. I felt that it added on to the first book, with the extra details that couldn't be added before. Overall, it was a great book. I definitely reccomend this for anyone who needs a bit of adventure.