the answer is 12 inches
The most common height for a book is typically around 8 to 9 inches (20 to 23 centimeters). This size is commonly referred to as the standard trade paperback size and is widely used for fiction and nonfiction books.
5'4"
Most common height 30".
15-17 hh
That's below average
height, blood, water, weight, dark
The most common height is 32-33 inches but can range depending on the user from 3-4 feet high.
The joker (bat man) is the most popular comic book, and movie villains.
Pine.
The Bible, the Quran, the Torah
The two most common electronic book formats are pdf and epub. PDF comes first because it is universally accepted on computers and most ebook reading devices.
The most common children's book publishers is Peace Hill Press. You can see a list of the publishers at http://en.wikipedia.org/wiki/List_of_publishers_of_children%27s_books
There's no single standard, but the most common heights for bar stools are 30 inches and 24 inches (seat height).