Here are some book codes, to put them on club penguin click play now then click unlock items online and then log in normally. Once you are logged in say I have a book and click the title where the codes are. They ask you about it and answer using the following. Hope this helps!
Bubbeboo124
The Ultimate Offical Guide To Club Penguin:
Page 9- Sometimes
Page 35- Misses
Page 38- Scavenger
Page 40- Examples
Page 62- Picture
Page 63- How
Page 64- Fishing
Page 65- Storage
Page 71- Seats
Page 71- Musical
Page 73- Search
Page 75- Tossing
Page 77- Buying
Page 101- Donated
Page 117- Jerseys
Page 118- Squads
Page 140- Breeze
Page 141- Combined
Page 143- Secret
Page 155- Queen
Page 156- Small
Page 169- Start
Page 171- Annual
Page 175- Crown
Page 176- Item
Page 179- Penguins
Page 182- Actions
The Stowaway Codes:
Page 1- Stowaway
Page 6- Mysterious
Page 7- Rockhopper
Page 21- Migrator
Page 25- Yarr
Page 40- Waterfall
Page 52- Deck
Page 80- Penguin
Page 101- Rockhopper
Page 177- Puffle
The Inventor's Apprentice:
Page 5, 5 words from the left on line 10 - Good
Page 5, 4 words from the left on line 3? - Board
Page 6, 7 words from the left on line 14? - Extreme
Page 7, 7 words from the left on line 17? - Where
Page 8, 7 words from the left on line 4? - Round
Page 6, 5 words from the left on line 17? - Plans
Secret Agent Handbook:
Page 5, 4 words from the left on line 18 - Decides
Page 5, 6 words from the left on line 9 - Give
Page 5, 4 words from the left on line 2 - Matter
Page 5, 3 words from the left on line 5 - Fashion
The Offical Stage Playbook:
Page 3, 2 words from the left of line 12 - Acting
Page 3, 7 words from the left on line 5 - Show
Page 3, 5 words from the left of line 3 - Bright
Page 3, 5 words from the left on line 14 - Flipper
Star Reporter:
Page 6, 5 words from the left on line 5 - Printed
Page 7, 6 words from the left on line 12 - Staff
Page 5, 5 words from the left on line 7 - Inside
Thanks to The CP Genius