How book selection works

The problem with simple voting

If you just ask everyone to vote for one book and pick the winner each month, the majority always wins. That sounds fair, but in a club with diverse tastes it means the minority never gets to read what they want. After six months, some people have loved every pick and others have hated all of them. That's not great for a club you want people to stay in.

What we do instead: mark what you'd read

Instead of voting for one book, you mark every book you'd be genuinely happy reading. You can mark as many as you like — there's no strategy to it, no reason to be cagey. More marks never hurt you.

Your marks stay private until the month's winner is announced. That way nobody can game the system by waiting to see what's popular and piling on at the last minute.

How the winner is chosen: the balance of debt

Here's the key idea: every member has an influence weight that changes over time. When you join, your weight is 1.0 — full influence. When a book you marked gets selected, your weight goes down a little (the system notes that you got something you wanted). When other people's picks keep winning and yours don't, your weight gradually increases.

Each month, every book's score is the sum of the weights of the members who marked it. The book with the highest score wins. Then the weights are updated and we go again.

Over time this means everyone gets roughly their fair share of wins — in proportion to how many people share their taste, not just who shouts loudest. A minority of three members with similar taste will see their picks chosen about as often as you'd expect for a group of three.

For the curious: this is a variant of Phragmén's sequential method, a proportional voting rule with strong fairness guarantees.

What about people who stop coming?

If you show up and participate each month, your influence weight slowly recovers after wins — you stay in the game. If you stop participating, your weight stays frozen wherever it was. It doesn't keep recovering, so people who've drifted away don't accumulate a growing pile of influence that steers the club months after they've left.

Tiebreakers

Ties are rare once the system has been running for a few months, but when they happen: first we look at raw approval count (more people marked it), then page count (shorter wins — fewer barriers to finishing), then how long ago it was nominated (older nominations win, as a reward for patience).

After the pick

Once the month's book is chosen, the full results are revealed: the winner and the two runners-up. You'll know what was close — useful context for next month's voting, but the weights have already shifted so it's not a reliable guide to gaming anything.