Well, yes and no.
Ishmael is a thought provoking novel. It forces the reader to ponder Ishmael's teachings, and decide for him/herself if he or she agrees with what he is saying. It spawns debate and discussion, which, as not just students, but people, I think is the most important thing any form of teaching can do. But I don't think it's a useful book for an AP Enlgish class. I think it would be a waste of time, because it would be hard to integrate into an essay. Many AP English prompts I've seen ask questions about specific events, characterization or characters pasts, and they all ask the test-taker to relate it back to the meaning of the work as a whole. Ishmael fails in almost all of these categories. There's basically no specific "events" or scenes; it's all just dialogue. There are also really only two characters, both of which we know almost nothing about and certainly nothing that pertains to the "meaning" of the novel. We don't even know the narrator's name. I think I read on the back the Ishmael's sequel My Ishmael in the library that the narrator's name is Alex or something. I learned more about the characters in this novel from the back of a different book than I did from the actual book.
I can't see someone writing about this book in an AP essay, therefore I don't think it should be given out in AP English classes when there are more useful books to read.
With all that being said, I'll wrap up my feelings on the novel. I mentioned above something about how the characters' pasts don't help the reader understand the meaning of the novel. Well, come to think of it, I'm not sure I can even pinpoint the meaning of this novel. I mean, it's obviously about trying to save the world or humanity or whatever, but honestly I'm not even sure how to do it. It's obviously an astronomical task, saving the world, but I don't know where to begin. What Ishmael talks about are changes on a national, even global level. That's near impossible to achieve. Especially with this tough Congress, am I right?!?! (Thanks, Obama)
I enjoyed the book, even if I wasn't receptive to all the ideas it gave to me. But I don't know where to go from here, and that makes this reading almost a wasted effort.
Ishmael: An Adventure of Mind and Spirit


