A solid textbook on Ice Ages is sought, with Imbrie's "Ice Ages" being mentioned despite its age. Recent discussions emphasize that many older texts are outdated due to new evidence, particularly regarding oceanic interactions and volcanic activity during deglaciation. The complexity of Milankovitch cycles is highlighted, noting that astronomical factors must be considered alongside Earth's historical mass arrangement. The insolation theory, which links astronomical motions to glaciation cycles, remains a topic of debate, with recent studies by Lorraine Lisiecki and Maureen Raymo illustrating the challenges of aligning evidence with theories. The conversation suggests that while older theories may have merit, they require reevaluation in light of new data, particularly over the last 700,000 years. The discussion underscores the evolving nature of climate science and the need for updated resources.