What is a Library thief rhyme?

It seems like you're asking for a rhyme about a library thief. Here's a little ditty:

The Library Thief

A midnight shadow, swift and sly,

The library's secrets he'd defy.

With nimble fingers, books he'd steal,

To read by lamplight, a forbidden deal.

He'd slip past guards, with silent tread,

His heart with knowledge, deeply fed.

From dusty tomes, to novels bright,

He'd steal the wisdom, through the night.

But knowledge shared, is knowledge strong,

So let the thief, his bounty prolong.

For in the sharing, truths are found,

And books, their purpose, will resound.