Answer:
Though I am only two words I have thousands of letters in me
I build bridges of silver and crowns of gold. What am I?
Teenage girls are pros at creating me. Learn me in classes.
I am needed for most animals and hardcover books
I begin and have no end. Eventually I will be the end of all that has begun.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?