If you plan to
learn Indonesian online and need some free e-books, here I'd like to let you know that you can download for free some good quality e-books regarding learning Indonesian language on the above link.
You can also listen to the audio files available on the same site for free. Please let me know if you have trouble downloading the files and I'd be glad to send you all the PDF files together with the mp3 files to your personal email for free.
Thank you in advance.