there are lots of alternate printing techniques ...
i like to soak my exposed paper in water, then
put it in caffenol C for 3-4 mins then in water again ..
then i dilute and exhaused ansco 130 and watch what appears ..
about 20seconds in, back in the coffee + back and forth as it finishes up ...
this works great for paper negatives and cameraless images
( and maybe solarize ( sabbatier? ) images where you want
control over what appears and how dark you want things to get ...
no book for this, just experience ..