Thanks. Also some website/blog reviews I saw. Next time in the shop I'll leaf through the book (I'm a fast reader) and check...no time today.
OTOH, I suspect that Dolphy bio material is really scarce, rendering a detailed biography a la Szwed (for instance) unlikely. By way of comparison, I sprang for Combs's Dameronia, which had the same shortcomings. Tadd was both secretive and prone to dissembling / dissimulation, so there wasn't much to go by. [Sadly, I never managed to get a hold of Ian MacDonald's Dameron book.]