Found in 2 comments on Hacker News
WoodenChair · 2019-07-15 · Original thread
What both you and grandparent are missing is the biggest iPhone touch innovation of all: multitouch. Multitouch was invented largely by a one-person startup that Apple purchased, and the iPhone became the first device to mass-produce it. The book The One Device covers its development well: https://amzn.to/2lrbKA7
chaostheory · 2018-09-13 · Original thread
The One Device details the people and history well.

https://www.amazon.com/One-Device-Secret-History-iPhone/dp/0...

It just came out a year ago.

You can also try my user-editable site (https://theymadethat.com/things/k4z/iphone) where I aim for the same goal but with a different approach. The iPhone entry still needs a lot of work.

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