On to the first part, today we get the entire arc of how Khalid Ben-Hassin became the New 52's Doctor Fate!
This is a great jumping on point for those unfamiliar with Dr. Fate. However, if you are curious about the past Dr. Fates, here is a list of books that you should invest in:
The Golden Age Doctor Fate Archives, by Gardner Fox: This is the original Dr. Fate. Keep in mind that the source material is from the 40's so it can be a bit dated and silly at times but the mystical influence is still very heavy.
Dematteis' 4 Part Dr. Fate miniseries from the 80's: Unfortunately this was not released in trade format by DC but you can still find all four for sale by many sellers on ebay. Although I was not a fan of Dematteis' ongoing Dr. Fate run, this 4 part miniseries is a classic. A must read for every Dr. Fate fan.
Golden's Dr. Fate miniseries from the early 2000's: Another great Dr. Fate miniseries that featured Hector Hall as Dr. Fate. I've often stated that if there is ever a Dr. Fate movie, they should adapt this series as the script.
The Immortal Dr. Fate, by Martin Pasko: A classic among classics. Pasko is definitely one of my favorite writers that touched Dr. Fate. This is another collection of short Dr. Fate stories that were not collected in trade format, but were oddly collected in (I believe) 4 different extended comic books. You can also find all four (maybe five) for sale on ebay.
Dr. Fate Countdown to Mystery, by Steven Gerber: Gerber wrote what is probably my favorite version of Dr. Fate. It is a shame that he passed before he had a chance to complete the entire story but what he did was fantastic. This was not so much a story of sacrifice, as have been all prior Fates, but instead a story or redemption. Definitely a must read (as are all other on this list).
There you have it, ToF's essential Dr. Fate reading list. All this books truly represent what I believe Gardner Fox had envisioned his creation to be. So after picking up Earth 2 Vol. 2: The Tower of Fate, and you still want to know more about the good Doctor, check out the titles on this list.