For the impatient - use these admin credentials to return a book.

username: testadmin1; password: CHrJo9VBY


libman is a simple library management webapp for use in schools,
universities and companies.  It is MIT licensed, so can be used
commercially also.

To install libman, please see the accompanying INSTALL.

The major workflow is -

 * User searches a book.
 * User borrows a book that is interesting.
 * After reading, user gives the book to admin, who marks it returned.

There is a demo here -

As mentioned at the beginning, you need to use the admin credentials
to mark a book as returned.