Yo te enseño español y tu me enseñas persa =)

I think this website is useful: http://persian-language.com/learning-list.html

Also, in below URL you can download Farsi educating books in any level:

http://www.scict.ir/portal/Home/Default.aspx?CategoryID=c42c4f00-701d-4cff-9388-757b97f03c7c

I hope that they will be ok.

Good luck

There's not a book that particularly focused on alphabet.

But I found this site interesting

Www.easypersian.com

I'm studying persian in Madrid. I was travelling in Theran, Isfahan and Shiraz in November.Also Persepolis of course. It was my second trip and this year I repeat. Could you recommend a basic book for learning the persian alphabet???

ＹＯＵＲ ＭＯＶＩＥＳ ＩＳ ＵＳＥ persian