What are you reading on SaaS product marketing? Need recommendations.

Hey friends,
I am looking for newsletter/ blogs / twitter handles / youtube channels on SaaS product marketing.

These could also include newsletter, personal blogs (example - https://medium.com/@lindsaybayuk), SaaS blogs (example - https://www.intercom.com/blog/author/tales_of_cake/)

What do you guys read / follow ?

Please hit me up with recommendations - will be a big help. :)