Does anybody know if there’s a good book out there on VM/MAV?

Sadly, there’s not much. There are quite a few books on general migraine, e.g:

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A couple of top books on migraine

But for MAV/VM your choices are more limited, I’ve only found these:

VM/MAV specific books

Dr. Hain & co have written a chapter on MAV in here:

“Dizziness and Vertigo Across the Lifespan”
More recommended books here

And no doubt MAV will have entries in most books on dizziness and vestibular medicine published today (some of those are in the Recommended Products Page).

I don’t believe regular ‘migraine’ has everything in common with MAV/VM - hence the major difference in levels of dizziness and imbalance and 24/7 symptoms not found in ‘regular’ migraine. Whilst some of the same things apply (control of neurological elements is similar) that’s almost bound not to be the complete story, so having more specific publications makes sense.