apparently its the font used in Edward Tufte's books. Its on github: https://edwardtufte.github.io/et-book/
The "Quantitative Display of Information", which I just checked, is using Monotype Bembo. So still Bembo, but a different version.
alt Hacker News
The "Quantitative Display of Information", which I just checked, is using Monotype Bembo. So still Bembo, but a different version.