Below are open source books which are aimed at undergraduate students who are taking Arabic in their first year. It starts from scratch and builds literacy in the language while working on speaking and conversation from day one. These textbooks usie The World-Readiness Standards for Learning Languages developed by the American Council on the Teaching of Foreign Languages (ACTFL) as a framework.
The books can be accessed through the following links:
1- First Semester Arabic textbook:
2- Second Semester Arabic textbook:
Here is a new book to learn Arabic: Letters and Meanings: Gateway to Arabic. Level A1.1 / الحروف والمعاني. مدخل إلى اللغة العربية. Victoria Aguilar, Miguel Ángel Manzano & Jesús Zanón. 2019. Editum: Murcia. You can download it for free (the book, audio files and handwriting guide) through this link:
Students can get access to the videos from Al Kitaab, Part 1 and Part 2, second edition through this link: https://media.ed.ac.uk/esearch/search?keyword=Al%20kitaab.