End of the Year Book: Back Summary #1

Here is what I have for the back summary so far. Please read and comment, giving suggestions, comments, fixing errors, etc.

The hourglass has been in use as early as the 11th century, usually consisting of sand that transfers from one glass to another through a narrow tube. This simple device is used to measure amounts of time reliably and is still in use today, but are there secrets of the hourglass that have not yet been discovered? Could this common item transport beings from one dimension to another or bond with the spirit of a dragon? Is it possible that the hourglass could have hidden, mystical powers? Or perhaps the hourglass is just another of the many items strewn across a desk…