Should I buy an ISBN?
An ISBN is an identifier that easily allows bookstores, libraries, universities etc to track purchase and market their inventory.
Do I think you need one? No.
Have I ever used one with my planners? No.
Many people create planners and sell on their own website without any kind of identifier.
If the look inside program is very important to you, you can purchase an ISBN to get access to it for that specific planner.
However, if you have a website I’d recommend using that to host additional images, create a sales page for your planner and then direct them to buy on Amazon.
