The Book Shelf is an area of the Book Room where penguins can read books. The books on the Book Shelf consist of official stories, yearbooks, or user-submitted stories. Unlike clothing, and igloo upgrades, all books in the library are free to read and are available to Non-Members. The Book Shelf is not updated often.
- March 9, 2007: The first book, Rockhopper and the Stowaway is added.
- March 23, 2007: Truth or Dare, Franky's First Show, and The Spice of Life are added.
- April 27, 2007: Penguin Tales: Spring '07 is added.
- October 24, 2007: The Yearbook 2006-2007 is added.
- March 10, 2008: The Paint By Letters books, My Puffle and Burnt Out Bulbs are added.
- March 14, 2008: The Yearbook 2005-2006 is added,
- April 11, 2008: The Journal of Captain Rockhopper is added.
- May 30, 2008: Penguin Tales: Spring '08 is added.
- October 24, 2008: The Yearbook 2007-2008 is added.
- February 3, 2009: Lime Green Dojo Clean is added.
- September 11, 2009: Penguin Tales '09 is added.
- October 24, 2009: The Yearbook 2008-2009 is added.
- October 23, 2010: The Yearbook 2009-2010 is added.
- October 23, 2011: The Yearbook 2010-2011 is added.
- June 14, 2012: The Paint By Letters books are removed.
- October 23, 2012: The Yearbook 2011-2012 is added.
- October 24, 2013: The Yearbook 2012-2013 is added.
- October 23, 2014: The Yearbook 2013-2014 is added.
- September 30, 2015: The Yearbook 2014-2015 is added.
These are all the books the Library currently has:
- Rockhopper and the Stowaway
- Franky's First Show
- The Spice of Life
- Truth or Dare
- Penguin Tales: Spring '07
- Penguin Tales: Spring '08
- Penguin Tales '09
- Turn Blue and Sink the Iceberg (by Chewydr)
- Hiking Vikings (by Pamelin40) (Translated from Spanish)
- Wildlife (by Myndynha) (Translated from Portuguese)
- Igloo Dance Party (by 4484lune) (Translated from French)
- Yearbook 2005-2006
- Yearbook 2006-2007
- Yearbook 2007-2008
- Yearbook 2008-2009
- The Journal of Captain Rockhopper
- Yearbook 2009-2010
- Yearbook 2010-2011
- Yearbook 2011-2012
- Yearbook 2012-2013
- Yearbook 2013-2014
- Yearbook 2014-2015 (10 year edition)
These are books that were temporarily added in Christmas 2008, and removed after the event:
In 2010 these books returned for the Christmas Party, and removed at the end. The books reappeared during the Holiday Party 2011 and were removed after the party.
- In the French, Portuguese and Spanish servers, the Paint by Letters aren't there.
- The only book with its spine not facing you is Rockhopper's Journal.
- Originally, there was only one book, and that was Rockhopper and the Stowaway.
- On the left, there are other books, but, you can't read those.
- The first Yearbook (Yearbook 2006-2007) was added during the 2nd Anniversary Party.
- The second yearbook (Yearbook 2005-2006) was added March 18, 2008.
- On the first day when the Yearbook 2012-2013 was added, the title on the spine cover on the Yearbook 2011-2012 was changed to 2012-2013 instead of 2011-2012. This glitch has been fixed.