the last line in the grave diggers handbook reads "we wish you every success with your career in the funerary arts and hope this book has helped in some way." how does this relate to liesel and papa?

Although Liesel was not going into the funeral business, the book did help her learn how to read. This opened up a whole new world of understanding and expression for Liesel: reading changed her life. Hans used this book to help Liesel learn how to read, It is, in part, this early bonding which made them so close. Reading was the precious gift that Hans gave to Liesel.