Cool tool alert: ISBN visualizer

I love this tool, brought to my attention by reader Ian Lamont. You can view the ISBN visualization here.

He notes, “One very practical use of this system is the ability to quickly see all of the books published by a single publisher in a specific reserved block as well as all of the unassigned ISBNs in that block. It would be a useful tool for researching a publisher’s historical output as part of due diligence. Note that the tool doesn’t reflect duplicate ISBNs (something I was unaware of until reading this).”