Doctor Faustus is a surprisingly short and, for a 500 year old work, readable play. This free Kindle version has some OCR-type errors, but is itself very readable. There are hot links to and from footnotes.
Marlowe gives a chilling portrayal of a man who chooses to have the world - particularly through magic - temporarily in exchange for his soul eternally. Whenever Dr. Faustus questions his own choice, the Devil beseeches him and he reaffirms that choice. Dr. Faustus's intrigue with magic is all the more chilling in the historical context of Elizabethan England, when it was written, generally, and in particular the activities of her adviser John Dee and his fascination with the black arts. The play is no empty fantasy but a withering criticism of Dee and of the dabbling done during Elizabeth's reign, written with insight and wit. Those who try to summon and command angels will deal with the fallen angels.
The play can also be read as a critique of Puritanism/Calvinism by a Catholic, but there are also passages that leave room for argument by suggesting predestination; then again some ambiguity would be prudent if a Catholic were writing during the time of the Virgin Queen.