How are your books printed? If POD are they in the Ingram Distribution system? Lightning Source allows you to mark your books as "returnable" and suggest a discount of 55% for bookstores to be interested in them. So usually you need these three aspects to get in stores:
- Ingram distribution (because they buy in bulk from distributors and having you as an individual "vendor" is not worth it to them to do the extra book keeping
- Discount of at least 50% - although 55% or 60% makes it more helpful
- Have the books listed as returnable.
The other choice is to do it on consignment. Ship them books for free for x amount of time - and if they sell they send you $'s if they don't then you pay to have the books picked up again.
I will say that in general this is a very costly venture - returns generally will kill you unless you have a book that is very popular and independent bookstores have VERY limited shelf space.
I realize there may be "personal" reasons for wanting to see your books in stores -but from a financial standpoint you'll probably make pennies or even loose money due to the shipping and returns.