That was the last page of the book, the idea being that if you reached that page it meant that you'd won. But you don't need to know about that, because you're not going to be playing the book version. The card rules are as follows:
1. Each player shuffles their deck of 15 cards, placing the cards face down beside them.
2. The players each take their top card and reveal it to the opponent.
3. Each can study the other's card, but when either player is satisfied he knocks on the table and says, "Ready." The players then take up their cards again.
4. Each player now decides which of the characters on the card to send into battle. He turns the card (face down) so that character is nearest to his opponent.
5. The cards are now turned over and compared. The winner discards his current card and draws the next card from his deck. The loser retains the card he has just played to use again next round. If there is a draw, the player who is behind (ie, has discarded fewer cards so far) gets to discard - a levelling factor. If there is a draw when the players are neck and neck, both discard.
6. Play now continues to the next round as before. The loser from last round uses the same card as before, but he may choose a different character on the card to go into battle.
7. The winner is the first player to discard all his cards.
The game is, as I hardly need to tell you, Rock Paper Scissors only in a five-way matrix:
Hope you enjoy it. And if you do, or if you can suggest improvements, that's the comments button right below. The illustrations are by the ever-brilliant Russ Nicholson, of course.