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.

Nice combo with Minh Thi Phan :

1) put in play Scavenging (2) and Glyphs (+1 clue / 2 pts of success)

2) investigate with Glyphs, commit The Necronomicon

3) succeed by a wide margin (you are investigating with a skill value of 10+ ...)

4) use Scavenging (2) to either take The Necronomicon back in your hand or play it for 3.

Of course it's a 10 XP combo and each test can be failed but it's a fun way to use 5 slots in a deck with cards that can be useful outside of this combo.

tl;dr Well Prepared, Archaic Glyphs (Guiding Stones), The Necronomicon is a crazy combo that can trivialize clue-gathering.

In longer form...

This card is a core piece of my favorite Arkham LCG deck: Joe "The Book" Diamond. It's a basic three-card combo deck that can perform absolutely mind-boggling feats of clue-gathering and save tons of actions.

So we've got the Nomnomicon. What's the rest of this combo? It's pretty simple, but at the time of writing only Joe can pull it off. You just need Archaic Glyphs and Well Prepared! With the Necronomicon this comes out to 15 XP total. Triggering Well Prepared on the Necronomicon gives you +5 to Intellect, which with nothing else is already a 9-value stat. Assets and other commits, as well as skill boosts from the Necronomicon, can easily raise you enough to pick up 3 or more clues reliably per action.

Plus, this card just straight value in Joe. It supplements free clues from his Hunch deck, damage against enemies, and can be refilled/used for free via Truth from Fiction, Astounding Revelation (if you're running searches), and Knowledge is Power.

You won't always need to spend four Nomnomicon charges, exhaust two copies of Well Prepared, and commit four Intellect icons from hand in order to succeed an Archaic Glyphs investigation by 23 and pull 12 clues off of a single location with a single action. But when you do, the Well Guided Necronomicon is here to help!

I really don't like how this card has no downside thematically. There really should -2 to max sanity, draw encounter card, add a madness or something to reflect the mind-shattering properties of the book.