I have lots to say but never speak,
I open but you cannot walk through me,
I have a spine but no bones.
Inside me the adventurous find
Quests and treasures of every kind
Trolls,goblins,orcs, and more, await
Within my closed Walls for
All those that wish to visit me.
Your hands are the key
To secrets untold,
And your mind will unlock the door
I am a ship to lands of treasure,
I am a key to wisdom's pleasure.
I will always lead you on an upward treak
I have so much to tell you but cannot speak
If you can guess who might I be...
I will tell you all about the mysterious sea!
What am I?