Book 3, page 128 - there is option to ask merchant about Ragadorn, to ensure that he isn't just pretending to be merchant from there. It should be available, if You have ever been to Ragadorn.

I have been there in book 2 (including killing three thugs with bare hands, and buying ticket to Port Bax - or how it was called), but I still can't choose this option (greyed out).

It's a bug, or it require more activity in the city? IT seems unlikely as it's clearly stated" If You have ever visited Ragadorn, You can ask him some simple questions about the city, to allay any suspicions You may have about who he claims to be, by turning to 11".

Considering that I have wandered whole city from west to east side (crossing bridge, through river that separates both parts of the city), there shouldn't be problem with simple questions. Also, while traveling to Ragadorn, woman told me about pirate-lord that rules this city, etc. Seems like enough informations.

/Estel

// Edit

It would definitely help, as:

[SPOILER]
he turned out to be hellghast
[/SPOILER]

// edit 2

In book 3, Drinking potion, that should restore 6 endurance points (in possession from book 2), doesn't result in any endurance gain OTOH, potent "something" - that we can choose at beginning of book 3, and should recover 5 endurance points - works OK.

// Edit 3

On page 301 (third book), there is option to make use of hunt skill, to silently approach guards and poison them. unfortunately, despite having hunt skill, I can't choose this option.

// edit 4

After killing undead tentacle monster in main chamber of ice fortress (book 3, the monster with 50 endurance), lone wolf splits error:

then, I'm able to choose BOTH "If You won battle in less than 5 rounds" and "If You won battle in more than 5 rounds". After choosing the former (as I have won in 2 rounds), error is repeated.