Dainin

There's that whole path of Jhana phases in Theravada Buddhism. In Sufism, there are Stages (temporary) and Stations (permanent) that a dervish would go through. Probably lots of other systems have this too. In my opinion, I think it would probably be better to have a live teacher to check on your progress with this kind of thing, rather than reading a book and developing a set of expectations based on it.

In case you might be interested, the last two sections of Tom Bisio's Daoist Meditation course ($150) are on Sleeping Meditation and Sleeping Gong. He also has a book ($20): Daoist Sleeping Meditation: Chen Tuan's Sleeping Gong. I think that master who pulls trucks with his balls (Master Tu maybe?) has an 8 Pieces of Brocade DVD that also has some information about sleeping qigong on it. I haven't seen it.

BKF=Bruce Kumar Frantzis (he later dropped the Kumar).