
It has been said by Elkeinkrad already, but I want to point out how this can be good in any investigator that has around 10 skills or more in their Deck.
Digging your deck with the Scroll of Secrets (3) allows you to do the following, without spending a single action:
• Look in your deck for Written in the Stars and place it in your hand
• Place the skill you've chosen on top
• Potentially discard a weakness
• And then immediately use Written in the Stars.
Also, the fact that the Secret is spent during the trigger makes it a perfect synergy with Abigail Foreman who can trigger it twice, and the fact that you use the cards at the bottom of your deck makes sure that you don't take the same cards again (unless you chose to return one card at the bottom of your deck).
Also one quick mention to Eidetic Memory that can give you extra uses at the end of a Scenario though I'm not so sure it's the most effective way to spend your XP.
It is of course better to use this in Astronomical Atlas-Norman or Amanda as pointed out, but also:
• Deck-cycling Harvey Walters can benefit from this, especially as it helps deal with that terrible weakness
• Minh Thi Phan who is the Skill- would love it too (imagine finding Sharp Vision), and can also Scavenge it!
• Mandy Thompson loves digging her Deck and would love to find Eureka! (even though it doesn't use the "search" words so it doesn't trigger her )
• Rex Murphy would love Perception (2) to draw a lot of cards while triggering his
• || Daisy Walker loves a Tome,
• Daisy Walker can also use Parallel Fates, Alyssa Graham and why not use Written in the Stars on Enraptured to fill up the Scroll with even more Secrets
• Joe Diamond is happy to have an Insight to recur with his
• Ursula Downs to get rid of that crippling Call of the Unknown though she's not the best user of this combo.
• Luke Robinson, Jim Culver could also use the card with Alyssa Graham and Scrying (3) but it seems less worth it.