Then you're not reading the right book. Or you're failing to comprehend the rule.
NHL rule 24.2
IIHF rule 24.2
24.2. PROCEDURE The Referee shall announce the reason for the assessed “Penalty Shot” and shall have the Player selected by the Team entitled to take the “Penalty Shot” announced over the Public Address System. The Referee shall then place the puck on the Center Face-off Spot and the Player taking the “Penalty Shot” will, on the instruction of the Referee, by blowing their whistle, play the puck from there and shall attempt to score on the Goalkeeper. The puck must be kept in motion towards the opponent’s Goal Line and once it is shot, the play shall be considered complete. No goal can be scored on a rebound of any kind (an exception being the puck off the Goal Post or crossbar, then the Goalkeeper and then directly into the goal), and any time the puck crosses the Goal Line or comes to a complete stop, the “Penalty Shot” shall be considered complete.