These are the digital pdf versions of the liner notes from Nozomi Entertainment's Blu-ray releases of Sayonara Zetsubou-sensei and Zoku Sayonara Zetsubou-sensei. These were previously hosted on RightStuf's website, but that site doesn't exist anymore since RightStuf was killed by Crunchyroll. Luckily, the Internet Archive preserved both of these files, and I decided to upload them here for ease of access. S1's liner notes were originally only available in a physical book that came with the Blu-ray, but they eventually stopped printing the book and offered a full pdf instead.