Every hour the series claims, and where it comes from.

No, and no book in the series says it is. Each one builds the number from its own chapters — the writing that chapter takes off your hands, and roughly how long that writing takes you now — and then qualifies it on the same page: the first week is slower because you are learning a tool, and the figures are realistic from about week three. Nobody timed a control group. Treat the table as the authors' arithmetic, shown in full so you can disagree with a row.

Because the paperwork differs. A trade whose customers need constant status updates carries a different weekly load from one whose work is mostly documented after the fact. The rows say which is which: the chapter, the writing, and the hours it stands for.

No. Every row in this table is writing — an estimate, an update, a note, a claim, a post. None of it is the work itself. That distinction is the whole position of the series and it is argued in each book's opening, all of which are free to read on this site.

Yes. Each row names the chapter it comes from, and each book's contents are listed on its own page. The chapter is the argument for the row.

They do not, and adding them would be meaningless. Nobody works twenty-five trades. The series total below is the sum of the table, printed because it is the honest arithmetic of the page you are reading, not because anyone gets it back.