The Toronto Public Library posted a photo on Twitter of a message created using the spines of books celebrating the Blue Jays’ victory over the Kansas City Royals in Game 5 of the American League Division Series.

The book spines read, “The Comeback,” “Blue Jays,” “Blowout,” “The Rivals,” and “Come Together.”

The Kansas City Library commented on the post by saying “Touché,” presumably bringing an end to two days of good-natured smack-talk between the two cities’ libraries.

The Kansas City and Toronto libraries started sending each other book spine messages after the Blue Jays fell to the Royals in Game 4.

The Missouri library posted a photo to Twitter on Tuesday evening of the spines of three books, using the hashtag "#bookspinepoetry."

Book spine poetry uses the arrangement of book titles to create a poem.

Shortly after the Jays lost 14-2, the library posted: "Some #bookspinepoetry for our friends @BlueJays & @torontolibrary."

The book spines in the photos read, "Canada," "Sorry You Lost," "What Bluebirds Do."

The library used part of a yellow sticky note to cover part of the middle title, a book by Matt Blackstone called "Sorry You're Lost."

On Wednesday afternoon, Toronto Public Library officials fought back, with an image of a Jays mug and three books lined up behind it.

The titles spell out "Warning Kansas City It Ain't Over Till It's Over."