@MisterRogersSnapped Jung - Modern Man in Search of a Soul
Gives a snapshot of his main themes in his ~middle period, so you get more of a feel for his method than his earlier, more empirical work and his later, more "finished" perspectives.
Packs quite a punch too, don't think I've read many books which provoke the same intensity of vertigo and soul-searching. Always cuts close to the bone.
@MisterRogersSnapped I highly recommend "the Essential Jung," covers all his work chronologically and is very well edited.
Wait for a quiet spell to start reading it though, I was finding excuses to read it constantly.