SOLVED. 90s Fantasy choose-your-own adventure book for kids [s]

[Bear]

My mom got me a choose-your-own adventure fantasy book from the (possibly Scholastic) book order form when I was in elementary school back in the 90s. I loved it, and I have no idea what happened to it. If I was to take a stab at when, I'd say the mid-late 90s, more likely mid-90s. I think those order forms had new or newish books, so I don't think it was an older book.

The main character or reader may have been sucked into a map to go on this adventure, or something like that.
I remember a wizard or something similar, with a riddle, "How many sooths does a soothsayer say on Friday" and the answer was "Forsooth."
I remember a character whose name was Lys or something along those lines. I knew it was a name I'd never heard and I wasn't sure how to pronounce it. She may have been a witch or a hag, or an enchantress who seemed to be a hag.
There was a foggy bridge, possibly with a knight nearby, that you could choose to cross or maybe follow the knight on another route. I know that one option led to a failed adventure or death of some sort.

If anyone knows it, I'd be extremely grateful! Thanks!

[Nell]

Treasure hunt by Jay Leibold. I’m not sure how to find the exact description, but searching in google books let me find the riddle you posted. One of the characters name was Egbert.

Let me know if any of this sounds familiar.


https://www.amazon.com/TREASURE-HUNT-...

[Bear]

Nell wrote: "Treasure hunt by Jay Leibold. I’m not sure how to find the exact description, but searching in google books let me find the riddle you posted. One of the characters name was Egbert.

Let me know i..."

I recognized the cover art immediately - that's definitely it. Thanks so much! I think Egbert was the knight by the bridge.