Not every book-writing lawmaker is running for president. But just about every wannabe president writes a book.

This brings us, for better or worse, to three new entries in the senator-courts-a-national-following genre of literature, from three figures with starkly different profiles — each rumored, with varying degrees of seriousness, to be a future White House contender.

• Senator Elizabeth Warren of Massachusetts, the Democratic firebrand, progressive folk hero and persistent irritant to Senator Mitch McConnell, the majority leader.

• Senator Ben Sasse of Nebraska, last year’s most vocal “never Trump” Republican, who dabbles in Uber driving and playful tweeting.