(def zone {:b [{:target :a, :direction :north, :cost 1} {:target :e, :direction :south-east, :cost 4}],
 :a [{:target :b, :direction :south, :cost 1} {:target :c, :direction :east, :cost 2}],
 :e [],
 :c [{:target :d, :direction :south, :cost 1}],
 :d [{:target :e, :direction :south, :cost 1}]}
)


#Given key A I want to find all connecting rooms
(map #(get % :target)  (get zone :a  []))
=> (:b :c)