There's nothing illegal about 140%, because the same share can be loaned out multiple times.
Anna lends Bob a book, Bob lends Charlie the book, now the book is 200% lent out. It's arguably risky and stupid to be Bob, because now he's in trouble if Anna wants the book back and Charlie doesn't want to return it, but there's nothing illegal about this.
Anna lends Bob a book, Bob lends Charlie the book, now the book is 200% lent out. It's arguably risky and stupid to be Bob, because now he's in trouble if Anna wants the book back and Charlie doesn't want to return it, but there's nothing illegal about this.