Its undertitle is ‘The Last Career Guide You’ll Ever Need’ – and it is presented as a manga-style comic, and could be read in well under an hour. It is an illustration of just 6 advices:

1. There is no plan.
2. Think strengths, not weaknesses
3. It’s not about you.
4. Persistence trumps talent.
5. Make excellent mistakes
6. Leave an imprint.
[7. Stay hungry.]*

but very nicely presented – which makes it of course much more understandable and memorizable. And thinking about it and establishing that in one’s life will take much more.

There is a related website.

* Addendum: in a related contest for a 7th Johnny Bunko Lesson, this was selectec with 72% of votes.