How to have book variants (paperback and coil bound)

[Phyllis058]

I create my own coloring books and connect with Lulu for printing.  I want to have two choices for my customers- coil bound or paperback.  I need to know how to combine these into variants since they are the same book only with different binding.  Please help.  I do need to create each book so Lulu can print them - how do I put them into one listing?  Thank you

[Phyllis058]

Thank you so much!  www.kindredcraftersstore.com

[Phyllis058]

A little more information -- I have created both coil bound and spiral bound books in Shopify and connected to Lulu.  However, I am only able to get the spiral bound ready to print.  I have the paperback as draft because if they are active then I have double the listings.  I have no idea how to fix this.  I appreciate your help!