Abstract: A closure for a door of a structure, for example, a wildlife observation or hunting blind, is provided. The closure can include a base plate, a door latch, a handle, and at least one tracking bar spaced from the base plate to form a gap, sized to receive part of a door panel. The tracking bar can include a primary sliding surface that faces and slides relative to a first side of the panel when converting the closure from a locked mode to an open mode. The plate can include a guide bar slidable within a panel guide slot coextensive with a transverse opening sized so the tracking bar can fit through it and retain the base plate and handle in sliding relation proximate the panel. The door closure can be installed relative to the door manually, without the use of tools. A related method of use is provided.