Under Random Encounters:

"In addition to the fixed locations the characters pass through, encounters can occur at any point as the characters venture through the unwelcoming environs of Brokenveil Marsh. While the characters are traveling or camping in the swampy wilderness, roll a d12 three times per day of game time, checking for encounters each morning, afternoon, and evening or night. An encounter occurs on a roll of 16 or higher. Roll a d20 and check the Brokenveil Marsh Encounters table to determine what the characters encounter, or choose an encounter you like."

d12 and d20 are switched, should read:

In addition to the fixed locations the characters pass through, encounters can occur at any point as the characters venture through the unwelcoming environs of Brokenveil Marsh. While the characters are traveling or camping in the swampy wilderness, roll a d20 three times per day of game time, checking for encounters each morning, afternoon, and evening or night. An encounter occurs on a roll of 16 or higher. Roll a d12 and check the Brokenveil Marsh Encounters table to determine what the characters encounter, or choose an encounter you like.