Found by going to the old temple southeast of Shadowfall, then in the western room look at the desk, and the drawer, then read book.
Possibly related to Quest 188 - The ruined temple
Describes one of the paths to Underdark (portcullis)
The book is bound in leather and reinforced with dull brass. Its cover is embossed with a name: 'Shirra'. > read book You open the book, and find it is a book of letters. Few of them are interesting, but the last one catches your eye: ____________________________________ I I I Shirra: I I The passage you told us about, I I The one Mallex uses to trade I I with these strange underground I I folk, has been found. I am I I afraid that it is much worse I I than we thought. Mengor, that I I unscrupulous fool, has opened I I trade with the drow. His secret I I passage can befound thusly: I I In one of his smaller shops, I I East of the River and directly I I North, you can find a cave that I I leads to the entrance. Look for I I a crimson spider, that is where I I you can find the entrance. I I I suggest an immediate attack I I is not a good idea, but a must. I I The drow are dark and evil, and I I must be destroyed in the name of I I our God! I I Kiel Mera I I__________________________________I