The S. L. O. T. (The Secret Library of Time)

Life turns out to be nothing more than a series of books, that are ever going and kept in a never ending library, the books have kept a record since the beginning of time. There are only two keys to this library, and are held within two pens. The pens have the power to change the past, alter the future, and brings things to life. Since the beginning the pens have chosen their masters and choose new ones every time their masters die. The drawback is, every time you use the pen you loose something, and you won't notice it... Until someone notices things they shouldn't, and it ruins time itself.