The greenhouse came with the house. The former owner, who passed away and cannot help, had it built by a pro greenhouse outfit.

About 20' wide x 40' depth, doublewall polycarbonate sides and roof in the curved quonset hut shape, a sunscreen shade like a perforated blanket over half of its roof, full HVAC stuff inside, big overhead gasfired heater, wet wall on the S end, all water supplied by adjacent building's rain capture setup with huge tank, pumps, etc, extralarge exhaust fan at door end at N side, a whole bunch of exotics growing inside in pots up to looking like 25g terracotta and even larger.

My question is, what book or texts do I buy that tell me how to operate this thing and have fun doing so?

It is a little N of San Antonio, TX.