This might be of interest for you, and its free PDF. From 2019 but still actual.
An Introduction to C & GUI Programming – the new book from Raspberry Pi Press
This might be of interest for you, and its free PDF. From 2019 but still actual.
An Introduction to C & GUI Programming – the new book from Raspberry Pi Press
Might be expensive for the specs but there are a lot of pluses. On-the-go replaceable battery, no 3.5 jack though…
https://www.fairphone.com/
I’m quite happy with mine. Bought when the promotion was the extra battery.