After going through first few lessons online using one of the websites ([...] ), I knew it was becoming essential to actually buy the PDFs as printed books. These are very good books for English speakers who want to learn the language, more importantly the grammar in detail. I liked the way it went through book 1 and looked at many nouns etc but only 4 verbs were used initially. Then in the 2nd book, we have the verbs in detail.
Overall its brilliant but note that I am using the learnarabic.info website which are basically recorded class lectures from Canada where these books are used specifically. I have not gone through the lessons myself but used these online lectures to compliment the books which are ONLY IN ARABIC. The english key attached is good but I found that the teacher going through them made it easier. Those lectures are extremely useful along with these books and the handouts that they have provided on the website compliment these books a LOT.
In my experience, these books combined with the online recorded lectures from that website, you will be amazed at how quickly you will start understanding things.