Para comprar tu libro de papel en 6" por 9" hacé clic en el formulario de contacto. 

They all come in paperback 6" by 9"  or digital for download in epub format. Contact us for school purchases.

US edition, written in upper/lowercase:  Podés comprarlos en Amazon.

En español:                                    En mayúscula para Argentina:

The online reading was brought to you  by our sponsors, true supporters of bilingual education in Argentina:

Argentine edition, written in UPPERCASE: $220 Pesos ARG.