There are no codes in clash of clans.
Clan code is a unique code given to each clan for its identification, you can look up for a certain clan (as there are many clans with same name), it contains numbers, letters and this '#' symbol at the starting.
There is no code as the gameplay data of the game is saved on their servers! You can't hack their servers!
"Code of the Clans" has approximately 176 pages in paperback format.
The ISBN of Code of the Clans is 978-0061660092.
Code of the Clans was created on 2009-06-09.
In secrets of the clans, code of the clans, and on the warrior cats website: http://www.warriorcats.com
Bluestar's prophecy was released July 28, 2009. Code of the clans was released June 9, 2009.
Thunderclan
on harpercollins.com
Sky (Revealed in Code of the Clans)
Firestar, Blackstar, Tallstar, and Leopardstar
If you mean Warriors secret editions than yes. 1st- Secrets of the clans 2nd- Cats of the clans 3rd- Code of the clans all of these are already out The new ones soon to be realesed 4th- Battles of the clans 5th- Allegiances of the clans