How many varieties of edible pepper spice there are? I know white, black, green and pink pepper, but I'm sure that around the world there are many more varieties. There is a comprehensive list or a book devoted to pepper and receipts with pepper? 
So far, the best reference I found is Wikipedia.  Black pepper (Piper nigrum) has the following varieties:   Black pepper White pepper Green pepper Orange pepper and red pepper   Cubeb (Piper cubeba), or tailed pepper  Long pepper (Piper longum)  Sichuan pepper (Zanthoxylum)  Pink peppercorn (Schinus molle, Schinus terebinthifolius) 