Karina, generally speaking, you don't really need bilingual books--you just need books in the minority language, in Spanish. Maybe your local library would even have a section of children's books in Spanish, or would be willing to start growing one? Although I've built up a large home library of books in our minority language, over the years, it's also true that I've taken full advantage of the collection of minority language books available at the library in town.
As for obtaining Spanish books online in thrifty ways, I invite others out there to offer suggestions!
"Maximize Your Child's Bilingual Ability: Ideas and inspiration for even greater success and joy raising bilingual kids", now available at Amazon (http://amzn.to/22XKuCt) and all global Amazon sites
I have had some luck using "Craig's List" type sites in Spanish speaking countries. Just like in the U.S., you find people looking to unload their children's libraries after their kids have moved out. Usually the exchange rate works in your favor. The problem, of course, is shipping. If you have relatives or friends in a certain country, this can be negated somewhat by having them pick up the books and packing them in their luggage next time they are in the states.
The cheapest way is to borrow books from public libraries. You can keep them for several weeks.
Another way, if you have family overseas, ask them to buy some books for you, and bring them when visiting.
Also, the public libraries, at least here in Arizona do many book sales where you can get books as cheap as $1. Also, find out which libraries in your city offer bilingual (English-Spanish) story times. In some special celebrations they give away books for free.
Check also some Baby/Children yard sales on FB; you may find some in there too.
I have a friend who is a school teacher, and she can buy some books for me on Scholastic with a special discount for teachers too.
Half Price Books, if it exists in your area (I think they cover most if not all of USA) have a children's foreign language section. Even in the middle of monolingual Iowa I managed to find quite a few Spanish books there. It's usually right next to the kid's section, and separate for the adult foreign language section.
You could also try to exchange books with other bilingual families you know. I have mentioned this to my friends but so far we haven't got around to doing it. Books are fairly expensive in Spain plus they often tend to sell hardbacks (which are more expensive). I don't think half price bookshops exist and where I live there aren't any second hand bookshops...but try secondhand bookshops and charity shops too. I got my books mainly from Amazon as where I live there is little choice in minority language books especially children's and they are more expensive but am also starting to look at Ebay. Are there any other UK online discount bookshops that I could order books from? Even starting to consider buying a Kindle/Ebook as you can download many books cheaper (although I prefer the traditional books!).
Mayken: My girl and I are going to see her ml grandma in our ml country for the Easter weekend. (And buy more books!)
Apr 13, 2017 4:35:53 GMT 9
Adam Beck: Mayken, I hope you two have a fun, book-happy weekend!
Apr 13, 2017 5:23:08 GMT 9
Mayken: On the train from Paris to Cologne we sat next to another ml mother and daughter from our school! Only noticed when almost in Cologne. It's a small ML-ml world!
Apr 13, 2017 21:40:37 GMT 9
Amy: Got fleeting impression during Skype call with daughter on holiday at grandparents' in ml1 country, that her ml1 pronunciation has improved! She even seemed more confident speaking in ml2!
Apr 14, 2017 23:12:48 GMT 9
Adam Beck: Mayken and Amy, you and your kids are both doing so well! Keep up your wonderful efforts!
Apr 15, 2017 21:26:50 GMT 9
Mayken: During the traditional German Easter fire, my daughter met her friend from her school day in the ml school! So many birds with one stone! (Sorry for the birds ;))
Apr 16, 2017 18:51:11 GMT 9