It’s fine.  The illustrations are stronger than the story.  The story is about someone who doesn’t fit in with his peers (in this case, an owl who likes poetry — hence the title).  He goes off on his own to enjoy his poetry in secret, but when discovered and teased he runs away, where he finds an audience (of mice) who appreciate his efforts, learning that poetry should be shared, so he doesn’t flee the next time other owls show up, and the more the owls listen, they eventually come to discover they enjoy it too.  It’s fine.  It just seems pretty much like a theme that’s already been done, without anything special to make it stand out.  But the illustrations are cute, and it is a good theme, even if it has been done before.