Part-1 is often bundled as "Qasas un Nabiyeen lil Atfaal" (For Children). Ensure your search string includes "Al-Qism al-Awwal" (الجزء الأول) to get the correct file.

If you are using this book for study, these supplementary resources might be helpful: English Translation/Notes: Archive.org provides a version with English notes. Vocabulary List:

: Instead of abstract rules, students see syntax and morphology applied in the context of stories they are already familiar with, such as the life of Prophet Ibrahim and his rejection of idol worship. Cultural & Spiritual Literacy

Downloading the PDF is step one. Here is a study plan used by successful Arabic students: