Usage:
dclib [OPTION...]
main options:
-l, --list List books in library
-c, --create Create a new book, see create options [-t,-a required]
-r, --retrieve title Retrieve info on a book
-u, --update title Update a book, use create options -t,-a,-s,-i to indicate update fields
-d, --delete title Delete a book
create options:
-t, --title title Book title
-a, --author author Book author
-s, --summary summary Book summary
-i, --isbn isbn Book ISBN