This rhetorical question is used to remind the reader that what happened to Amaziah is well-known. It can be translated as a statement. Alternate translation: "All of the matters concerning Amaziah, behold, are written in the book of the kings of Judah and Israel." (See: [[rc://en/ta/man/translate/figs-rquestion]])
Here the phrase "first and last" refers to those extremes and everything in between. Alternate translation: "all the matters concerning Amaziah" (See: [[rc://en/ta/man/translate/figs-merism]])