Dear Wikibooks user,
You received this message because you have added a link to one of the bookshelves which does not point to a Wikibook — a so-called red link.
Please note that the Wikibooks bookshelves are reserved for existing books only and red links are removed without further check.
It is also futile to create a page of the type "Please write book about xxxx here.". Such a stub would be a subject of speedy deletion and would not prevent the link from becoming red and being deleted eventually.
If you'd like to suggest a possible new book then you can use the Requested books list instead.
Your Wikibooks Administrator.