never
Series One or Series Five.
code:fe57h83vh
In September
the gift shop
Buy a puffle toya treasure book series will have it
FREEHOOD
No, you get the current series.
It's from the treasure book. To get into the treasure book, you have to buy a plush penguin, puffle, book, or charm set. Get the code from it and enter it into Club Penguin. Do that by going to the main place of club penguin where you press Start, and press your penguin. Don't log in. Press the "I've got a code!" button in the top right hand corner. Congrats! Pick 2 things from the treasure book. But be quick! A new treasure book comes soon.
Treasure book series 11. This requires a certain coin code.
The only way I know is too get the Club Penguin Treasure Book Series 3. You have to buy it and get the code.
brows throught toywiz.com they got some series 2 stuff there I believe that you could only unlock the series 2 treasure book when it was the current series. (It is the same for all of them.)
sometimes in catalogue but if u buy a club penguin series 2 toy, u can unlock it in the treasure book