Looking for feedback on book ideas

Folks,

I had a few ideas for writing books based on my experience doing the work.

What do you think about these topics?

1. From Zero to GraphQL servers

• Teaches GraphQL (from scratch) and explains optimization techniques with examples.
• Built GraphQL APIs at my workplace.
• Learnt that building optimized GraphQL APIs takes sufficient effort.

2. Good Enough DevOps

• Book teaches setting up servers with tiny exercises using Ansible.
• Setup static sites and Python apps.
• Teaches other necessary tools along the way.
• Ansible, Nginx, SSL certs, Monit, Log rotation and firewalls using ufw.
• Teaches the reader nuts-and-bolts so that setting up a $5 server isn't a daunting task.

Thank you.