Newsletter swaps and group promos: how indie authors share readers without spending money

Advertising to readers costs money and most of them scroll past. Readers who arrive from an author they already trust behave differently: they are more likely to open the email, and a fair share of them stay. That is why newsletter swaps and group promos have become a common way for indie authors to grow a list without a budget. The mechanics are simple, and most of what goes wrong comes from skipping the conversation before the swap.

A newsletter swap, step by step

1. You find an author in your genre with a list about the size of yours.
2. You agree a week, a book each, and a format: a sentence or two with a cover and a link, written by the author whose email it goes in.
3. You each send your own email, to your own readers, mentioning the other's book. Nobody hands over a list.
4. You compare notes afterwards: clicks, sign-ups, sales if either of you can see them.

The swap works because the recommendation comes from someone the reader already chose to hear from. It fails when the recommendation reads like an advert, or when the genres do not match. A thriller mention in a cosy mystery newsletter costs the sender trust and earns the receiver nothing.

A group promo, step by step

1. An organiser opens a promo with a theme, a date range and a rule for what qualifies, for example first in series, free, or under £2.99.
2. Authors apply with one book each. The organiser accepts the ones that fit.
3. On the start date, every author emails their own readers a link to the shared page.
4. Readers browse the page, pick up several books, and join several lists if the books are reader magnets.

A promo multiplies reach. Ten authors with 500 readers each put every book in front of 5,000 people. It also multiplies the risk of a weak link: one author who never sends, or who sends to a list full of freebie-seekers, drags the result down for everyone. Good organisers check that each author has sent before the promo closes.

What to agree before you say yes

• Settle the dates, and the time zone if you are swapping across the Atlantic.
• Choose which book, at what price, and whether the link goes to a store, your own page, or a reader-magnet sign-up.
• Decide who writes the blurb. The sending author should write it in their own voice, from a short description you supply.
• Agree where the mention sits, because the top of an email and the bottom are not the same swap.
• Say what counts as done. A screenshot of the sent email is a normal thing to ask for and to offer.

Put all of that in one message before the swap. A swap that goes wrong is often one where this message was never written.

The mistakes that cost you subscribers

Swapping too often turns your newsletter into a listings page. One mention per email is plenty, and your own news comes first. Swapping outside your genre brings in readers who unsubscribe at the next email. Sending readers to a bare store link when you could send them to a page you control gives up the chance to capture them. And accepting a swap with a list ten times the size of yours, because it flatters you, leaves the other author with a bad deal and a reason not to repeat it.

A worked example

Suppose you have 400 subscribers and you swap with an author who has 450. Your partner sends your book to 450 readers. If a third open the email and one in ten of those click, 15 people land on your page. If half of them sign up for your reader magnet, you gain about seven subscribers for one paragraph of writing. The same arithmetic in a ten-author group promo puts your book in front of ten lists at once, so the gain is roughly ten times that, less the readers the lists share. The percentages are illustrations, not averages: nobody publishes a cross-author figure, and your own open and click rates are the ones to plug in.

The two services that run most group promos describe the mechanics on their own pages: BookFunnel runs group promos and swaps from its promotions tab, and StoryOrigin does the same with newsletter swap matching built in. Our resources directory lists both.

Finding partners

Start with authors whose books sit next to yours in the also-boughts on Amazon and whose acknowledgements thank a newsletter community. Genre groups on Facebook and Discord run regular swap threads. BookFunnel and StoryOrigin both have promo boards and swap matching built in. If you are a member of the Indie Author Toolchest, the Promos page lets you open a group promo or propose a swap with another member directly, and the Community forum is where the details get agreed.

Measuring whether it worked

Count three things: clicks from the partner's email if they share them, new sign-ups to your list in the 48 hours after their send, and sales or downloads of the book you promoted. Then watch the next month's unsubscribe rate on the people who came in. Readers who stay after three of your own emails were worth the swap. Readers who leave after one were not, and that usually points to a poor genre match.

Related reading: what the job of a self-published author involves, and the six pages worth building on an author website, including the sign-up page a swap should land on.