This textbook is the latest edition, so all information is current.
Agaves of Continental North America
What stands out about this textbook is the way it links new material to prior knowledge.
Air and Water
A nice touch in this textbook is the timeline of major discoveries in the field.
Volcanoes in Human History: The Far-Reaching Effects of Major Eruptions – GOOD
This unbranded textbook is a budget-friendly option that still delivers good value.
