I'm helping a relative, who is a Venezuelan writer to sell his work for SATs.

The books are in Spanish and are Epubs.

I created an E-store using Flash, you can access here: https://app.paywithflash.com/product-gallery/124?user=4ae89f2ee7f68dd79d07f6d4eea6fcd2329f80eb1c3cc09bdf8f5776116c446d

Also I posted on Agora #1291358
So far, not much success.