This detail page shows several photos of the book to show what a first edition looks like.  The images are original photos taken of my personal copy of the first edition book. 

Her Forbidden Knight (1913):

• The original novel was published in several issues of All-Story magazine in 1913
• It was published, much later, in hardcover format in 1998 by Severn House, which is what is represented here. 
• The first edition is blue cloth with gold lettering and logo on the spine.
• The ISBN and price (US $24.00) are at the top of the front flap.
• This is the first Rex Stout novel, but this hardcover edition wasn't published until after his death.