Originally Posted By: mlord
Rather than moving the files, this method creates duplicate links for them. If you really want to move them, just replace ln with mv.
Code:
cd ebook_directory
mkdir mobi_books
find . -type f -name \*.mobi -print0 | xargs -0 -i ln {} mobi_books/

Exactly the solution I'd use too, but I'd be willing to bet it's a Windows machine, without a cygwin install.