The reading spans atmospheric science, oceanography, soil science, geophysics, ecology, and Earth-system science, plus a cluster of contested bioelectromagnetic-health books that this section treats with particular care. Entries marked [contested] or [fringe] are listed because they appear in the wider conversation and because you should be able to see clearly why they sit where they do, not because the section endorses them.
If you read only a few, these give the best overview of the biosphere as a single coupled system.
The pattern across all of them is the same: a kernel of real, established physics or physiology, surrounded by claims that reach far past what the evidence supports.