An amazing book for an amazing game. Much as with all the previous books for Aeon, Prometheus Unbound adds a huge amount of meat on the bones of an already well fleshed out setting. The expanded information on the Psi Orders is vital for Storyguides and Players alike. The authors did a great job in giving each order a distinctive voice, exploring their distinct histories and structures while threading together the common threats and challenges they share. The new mechanics are really well done and give serveral options for expanding the use of Psi Powers while not bloating the system with a ton of Mode effects.
This is a must buy for anyone who loves Aeon.
[5 of 5 Stars!]