Learning to Trust the Lion, My First Adventure in Narnia, by Jill Pole

My Brilliant Life in the Darkness-A Memoir, by Golg

Seeing the Glass As Half-Empty but Putting a Brave Face on It, by Puddleglum

And I Almost Deserved It, by Eustace Clarence Scrubb
Once a King or Queen of Narnia, Always a King or Queen by the Royalty of Narnia
Caspian X: A Memoir of My Life On the Throne by King Caspian
Don't Lose Your Honor: A How-To Guide Through the Transition Between Royalty and Boyhood by Peter Pevensie

Just be yourself by Lucy Pevensie

Parental Help in raising a Prince by King Caspian and Queen Lilliandil

When I Met My New Neighbor by Polly Plummer

Big Bad Wolves by Maugrim

Legends of the Golden Age of Narnia by Trufflehunter

"How To Become King And Get Rid Of Your Siblings" by Edmund Pevensie

"My Life As A Dragon" by Eustace Clarence Scrubb

"How To Train Your (Human) Dragon" by Reepicheep

Why I Don't Like to Swim - by Puzzle the Donkey.

"Manipulation: 5 Tips To Make People Obey You" by Shift

The Art of Foot Rafting, Written by it's Inventor- Chief Dufflepud
(Note he doesn't give Reepicheep the credit for this invention)

Reflections of a Queen: An Autobiography- Queen Swanwhite

Scaling a Sheer Incline With the Assistance of Pinions for the Purpose of Maintaining One’s Equilibrium- Fledge the First, aka Strawberry

Navigating the Unknown by Drinian

How to Bungle Food Service When You’re Invisible by the Dufflepuds

Narnian Wartime Surveillance Strategies by Farsight the Eagle

(Oh my goodness! You guys are so creative! I was laughing all the way through this thread. )

The First Jokebook by the Jackdaw

Yes, I'm a Mouse; An Autobiography by Reepicheep

Walking on Air; 101 Things to Do While Being Blown Across the Ocean by Jill Pole and Eustace Clarence Scrubb

How to win your best schools hygiene by Eustace Scrubb

What to do when Your Uncle Wants to Kill You! by Caspian

There's a Ring in My Pocket by Polly Plummer and Digory Kirke

Beware of Nightmares Coming True! by Lord Rhoop

Caspian & Edmund: A Tale Of Two brothers by King Caspian X

I Just Can't Wait to be King: the Musical by Miraz

How My Lost Brother Was Found, or Why I DON'T Have to be King by Corin

Duelling on a Small Scale: A Guide to Self-Defense for Little Creatures by Reepicheep

A Beginner's Guide to the Flora and Fauna of Narnia, by Eustace Clarence Scrubb