Why do hivemq-ebook-mqtt-essentials.pdf not demonstrate MQTT-SN?

MQTT
1

Today, I have done to read hivemq-ebook-mqtt-essentials.pdf, it make me be very beneficial.

Thank you, @HIVEMQ team.

But Why do hivemq-ebook-mqtt-essentials.pdf not demonstrate MQTT-SN? Which Ebook should I read?

I have searched these 2 links:

I also have searched in the google, but find no MQTT-SN Ebooks.

This is hivemq-ebook-mqtt-essentials.pdf that I downloaded:

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2

Hello,

Thanks for reaching out on our HiveMQ Community Forum.

We currently do not have publication on MQTT-SN essentials, however we do have 2 blog posts found here:

https://www.hivemq.com/blog/mqtt-sn-smart-choice-for-iiot/
https://www.hivemq.com/blog/mqtt-sn-for-cellular-iot-micromobility/

Hope this helps.

Regards,
Gil