What you're actually getting
This is a Kindle eBook from the 'History from Beginning to End' series, and it sits somewhere between a pamphlet and a proper short read. We're not talking an Evan Evans 900-page doorstop. It's designed to give you a coherent overview of Auschwitz, the system behind it, the timeline, the scale. Compact by design, not by laziness.
Personally, I read something similar on a train journey once. No signal, nothing else to do, and I finished it before Milton Keynes. That's not a criticism. For a topic this heavy, there's something to be said for a text that respects your attention.
Who this is actually for
If you already own Ordinary Men or have read Primo Levi, this probably won't add much. It's pitched at people newer to the subject, or those who want a refresher before visiting a museum, watching a documentary, or just filling a genuine gap in what they know.
It's also, right now, free. Or near enough as makes no difference. That changes the calculus a bit.
One honest reservation
The series varies in quality depending on the topic. Some entries feel thoroughly researched, others a bit thin. This one sits in the solid-to-decent range based on community reception, over a thousand heat points on HotUKDeals, which for a history eBook is not nothing. Just don't expect footnotes or academic depth. It's an entry point, not a thesis.
If it nudges you toward reading something longer on the subject, it's done its job.