You may not find a book that is best for any course or subject. Rather you look for a book that best treated a topic or some topics. So you need to list the topics of your interest and then look for books that best treated the topics.
There are many books on agricultural economics around the world, each of which includes topics whose topics have been explained in a way and the writer understood them, so you can identify the subject and search for it.
Just please let me point to the following RG article that highlight the perspective of agriculture and agribusiness from the Holy Qur`an and Al- Sunnah:
Article AGRICULTURE AND AGRIBUSINESS FROM THE PERSPECTIVE OF AL-QUR ...
Agricultural economics is a department rather than a course. in order to fulfil bachelor of agricultural economics you take different course. depending on that there are a lot of best books if you need contact me