Skip the bookseller sites (unless you want to find one of these titles in your library), and read on...
My son and wife are very successfully raising a bilingual child -- French and English. She is now in 3rd grade and studies everything in both languages.
Many children grow up in bi lingual homes... their parents speak to them in and they pick them up like they do everything else.... often using them interchangeably. My grandson will be tri-lingual and seems to respond appropriately to whomever is speaking.