Who'd ever think a psychotic master criminal like the Joker would actually have a library card? Well, for the purposes of this 1968 short, he did, in order to learn as much as he could about pirate lore. Today, this plot would take up a full half-hour or better. Back then, it's worth nothing more than nearly 7 minutes of your time as Batman & Robin duel with "Long John Joker". Uploaded by TheSuperheroNetwork to YouTube:
Writer Bob Haney authored several Batman stories for DC Comics from the 60's through the 80's. A pity he wasn't persuaded to adapt this tale into print.