- letters and sound-Ahlan wa Sahlan Audio أهلاً وسهلاً الكتاب الاول. - الحروف والأبجدية

The conection is 100 % secure, they just want you to go to yale side insteat which you can use the 3rd ed link 

Audio and Video for Letters and Sounds of the Arabic Language (the Workbook) Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6   aleppo http://yupnet.org/languages/ahlan-wa-sahlan/program-for-the-workbook/  Audio for Letters and Sounds of the Arabic Language (the Workbook) isbn 0780300140484 second edition  Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 3rd ed same but different pages and excersise numbers