This card is one of the most insane cards seen to date. Combined with Sleight of Hand, Knowledge is Power and/or Scavenging you have a monster card.
- It gets up 2 missing clue from anywhere
- It kills 3 health enemies
- It draws up to 6 cards
- Or act as 6 Unexpected Courage
all as actions, combined with Sleight of Hand you can use it for an entire turn for only 1 resource. With Knowledge is Power you can activate anyone of it's abilities once. Once those cards is used up play it and use it again and then once it is spend overwrite it so it gets discarded and fetch it back using Scavenging.
Use this with Rex Murphy and only 5 XP you can get all of the above and with Research Librarian and/or Mr. "Rook" ensures that this combo is almost a sure thing.
It is not even unique so all seekers can get one in multiplayer.
Edit: Got the actual pack now and it turns out that the above was not good enough, so seekers got one more tool to recycle it using Library Docent and an extra tool to find it with Whitton Greene.