Updated the icon.
Lowered the threshold for the smaller padding to 360px.
Use cursor: pointer for .book
Move the on-click handler to paper-ripple so that the paper-menu is also clickable.
Set the window title to the book title.
Only show the bottom toolbar if there is more than 1 page in the book.
Removed the tap-highlight style, which leads to much better performance on mobile devices (and no more flashing when you tap on the screen).