How Many Books Should I Self-Publish?

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Publish as many good books as you can get onto the market, in one niche. There is no magic number, but the 2025 Written Word Media survey shows income rising with book count: about four in five authors with one to three books earn under $100 a month, and authors with 25 or more have a median of about $3,000. My book sales calculator shows how many copies a month you need to sell, which helps you see how many books you need to get there. Below: what the numbers say and what they do not, what Chicken Soup for the Soul got right, and how to get more books out faster.

How many books do self-published authors need to earn money?

More than one or two. The 2025 Written Word Media survey of 1,346 indie authors says “the more books an author has published, the more they tend to earn.” About four in five authors with one to three books earn under $100 a month. With 5 to 9 books, the median is about $50 a month. With 25 or more books, the median is about $3,000 a month and 40% earn $5,000 or more (Written Word Media 2025 Indie Author Survey, 02-Dec-25). Income is self-reported and the survey says correlation is not causation, so treat it as a guide.

What do these numbers not tell you?

Three things. They come from 1,346 authors answering a survey, so the income is self-reported, and the survey says “we’re describing patterns, not guarantees.” They do not say a tenth book will sell because the first nine did: authors with many books may also be the ones who kept going, stayed in one niche and learned marketing along the way. And the median hides a wide range, since the 25 or more group still has authors under the median. Use the table to set a direction, not a promise. If you want the sums for your own book, how many books do you need to sell to make a living works out the sales behind an income.

It matches what I see. One of the best marketing strategies is just to write more books. If you have written a book or two and they are not selling, that does not mean nobody wants to read what you have to say. It usually means you are early.

What can Chicken Soup for the Soul teach us?

When I was at the Air Force Academy, my roommate read lots of the Chicken Soup for the Soul series, book after book. I began to wonder how many there were. The series was clever: Chicken Soup for the Soul of a Hiker, of Children, of Grandparents, and so on. A hungry market, fed more books on the same subject.

You see the same in fiction, where a series builds a universe, and in nonfiction, like Hal Elrod’s Miracle Morning books. The audience knows you, likes you and trusts you, so they want more. The survey agrees: top earners often have series, because the money you spend promoting one book carries to the others.

Why do old books matter?

They sell on the long tail, like music. Not every day, but a little here and there, across every format and store. Your newest book may get the most attention, but in my business the old books together outsell the newest ones. Selling in many places helps.

How do you set up a series on KDP?

When you add a book on KDP you can choose Add series details, then say whether you are creating a new series or adding the book to one you already have, and fill in the Series Setup page. KDP says the series title must follow its book title guidelines, which rule out things like sales-rank claims and promotional wording. It also says public domain books and low-content books, such as notebooks and journals, are not eligible for a series (KDP metadata guidelines). The page has no date. Its footer shows 2026, and it says nothing about how long a series page takes to appear, so check your Bookshelf after each book goes live.

My advice: decide the series name before you publish book one. It is easier to give the first book its series details at the start than to go back and add them once book three is out.

Why one pen name per niche?

Don’t mix subjects under one name. I made this mistake. I was interested in habits, goal achievement, sleep and many other subjects, and I put books out on all of them. That watered down my audience. People who wanted habits books did not necessarily want sleep books.

Steve Scott did it right with habits: Habits for Runners, Habits for Children, Habits for Adults. Hitting one topic from different angles brings new customers, and you learn as you go. If you like different topics, use a different pen name for each niche. Many authors do, and it is accepted practice. Make sure the books are good, or low reviews will stop sales.

Should I wait until book 2 is written before I publish book 1?

If book 1 has already been out a while and did not sell, read should I write book 2 if book 1 didn’t sell. My advice for a book that is ready: publish book 1 when it is ready. Waiting has one real upside. A reader who finishes book 1 can buy book 2 straight away. Against that, you spend a year with nothing on sale, no reviews and no feedback on your cover or description.

If book 2 is close, a pre-order can bridge the gap. KDP allows a Kindle ebook pre-order up to 18 months ahead if you create it on or after 02-Sep-26, and it must have your final file at least 72 hours before release or it is cancelled. Two missed deadlines remove your pre-order privileges for 6 months (KDP: Kindle eBook Pre-Order). Check the dates before you set one.

Planning a series release? How to market a book series covers what to do once book 2 is out, and group coaching is where we work out the order and the dates.

How far apart should I release the books in a series?

KDP’s help page “Create a Book” says: “Up to 2 new titles per book format each week,” reset every Sunday at 12:00 AM UTC (KDP: Create a Book). The rule can change, so read the page before you plan. The limit is a ceiling, not a target. It only stops you releasing a whole series on one day.

Pre-orders are the tool for spacing. Set up book 2 as a pre-order while book 1 is live, using the dates above, and keep the 72-hour file deadline in mind.

My advice: aim for 30 to 90 days between books. Closer than 30 days and you will rush the editing and cover. Beyond 90 and readers forget book 1. Start with 60 days, then adjust to how fast you really finish a draft. This is my judgment, not a KDP rule.

How many books should I publish a year?

There is no right number. In my view, publish as many good books as you can in one niche, and let the number follow from how fast you can finish a draft you are proud of. A steady pace pays twice. Each new book joins a backlist that is already earning, and each release gives readers who liked your last book something new to buy, while new readers find their way back to the earlier ones.

The survey figures above show the same pattern: authors with more books tend to earn more, though it is a correlation, not a promise. A pace you can keep up beats a burst of rushed books followed by months of silence.

My advice: pick a number you can repeat, then protect the editing and the cover on every book. For the gaps between releases in a series, see the section on how far apart to release them.

How can you publish faster?

Hire help. You can find ghostwriters on Upwork, or other marketplaces, to write on profitable niches you do not want to write in. You already know the publishing steps, so adding a manuscript is easy, and it frees up your time. Read my post about using ghostwriters on Fiverr before you hire anyone. If you cannot write fast, short books are another way to publish more often: see should you write and publish short non-fiction books.

KDP asks you to tell it when a book contains AI-generated text, images or translations (KDP content guidelines). It also limits how many new titles you can publish: two per format per week since 21-Sep-26 (ALLi, read 14-Nov-26), so check KDP’s current rule. Plan a steady pace of good books.

Want help choosing your niche and planning your next ten books? Join my group coaching and we will map it out.

How many books have you self-published so far? Tell me in the comments. One, none, a hundred, I want to know where you are.

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