I would recommend Helen Waddell’s book, “The Desert Fathers”. While I have not personally read it (though it is on the list!), I have heard nothing but good about it. It should serve as a good introduction to the Desert Fathers.
I would also recommend “The Sayings of the Desert Fathers: The Alphabetical Collection”, translated by Sister Benedicta Ward. It is a collection of stories about and phrases spoken by the Desert Fathers (and Mothers). These are more like something upon which to meditate.
While the first book should give you something of an “intellectual” introduction, the latter gives you more a glimpse into their heart. Combined, this should give you a good basis.
Hope that helps