Reddit reviews Neuro-Philosophy and the Healthy Mind: Learning from the Unwell Brain

I know that many of the early (last decade) EEG studies covering mood states and functional networks in bipolar disorder are covered in this book, which highlights some more general approaches based on experimental data.

For more academics, I would vouch for starting off somewhere like here for a review of BD in general, particularly network activity in euthymia and with a history of psychosis. These (1, 2) seem to cover the main bases for pathological states. The is a nice convergence of PET, EEG, and fMRI data over the past few years so if you're finding yourself wandering down one modality rabbit hole its worth checking out the others for completeness.