What is KDP? What is Kindle Direct Publishing?
KDP (Kindle Direct Publishing) is Amazon’s self-publishing platform for authors. It allows you to publish and manage eBooks, paperbacks, and hardcover books directly on Amazon.
Most Pubby authors use KDP to publish their books.
Website: https://kdp.amazon.com
What is KDP Select?
KDP Select is an optional 90-day enrollment program for Kindle eBooks.
When enrolled:
Your eBook is included in the Kindle Unlimited (KU) catalog
Readers with Kindle Unlimited can read your book through their subscription
Amazon requires exclusivity for the eBook during the enrollment period
Only eBooks published through KDP are eligible.
What is Kindle Unlimited (KU)?
Kindle Unlimited (KU) is Amazon’s subscription reading service. Readers pay a monthly fee to access a large catalog of eBooks.
If your book is enrolled in KDP Select, it becomes available in Kindle Unlimited.
Can I use Pubby if my book is enrolled in KDP Select?
Yes! If your book is enrolled in KDP Select, you can still use Pubby.
You should use:
Kindle Unlimited (KU) or Verified Purchase (VP) review options
Do not use the Standard review option while enrolled in KDP Select, since Standard requires delivering a manuscript file outside Amazon, which can conflict with KDP Select exclusivity rules.
⚠️ Important update: Standard reviews & Amazon limits
Amazon has placed restrictions on the number of “free access” / Standard-style reviews a reviewer can leave each week.
Because of this:
Standard review availability is limited to approximately 5 per week per reviewer
This is an Amazon-wide limitation affecting review pacing across platforms
As a result, Standard review assignments may be slower or less available than KU or VP.
How do I enroll in KDP Select?
From your KDP Bookshelf:
Find your Kindle eBook
Click the ellipsis button (…) under Kindle eBook Actions
Select Enroll in KDP Select
Confirm enrollment
You can also enroll via the Marketing tab in your KDP dashboard.
Important note about exclusivity
While enrolled in KDP Select, your eBook must remain exclusive to Amazon for the full 90-day term. You should only request KU or VP review types during this period if using Pubby.
Which Pubby review types are most popular?
Standard reviews: most common but now limited by Amazon’s weekly cap (~5/week per reviewer)
Kindle Unlimited (KU): very popular with KU subscribers
Verified Purchase (VP): strong demand due to higher snap value
We recommend using a mix of KU and VP for best visibility and speed.