Here is the full list of all 50 Black Book achievements.
Collect all the songs
Succumb to Dark forces
Complete Chapter 7
Unlock all the words
Unlock all the black words
Break all the seals
Complete Chapter 6
Retrieve the Book
Collect 70 encyclopedia entries
Visit 333 locations
Complete Chapter 5
Acquire 100 sins
Complete Karnysh loyalty quest
Collect 50 bailichkas
Talk with 100 characters
Gather 66 herbs
Compose a spell out of 13 words
Complete Chapter 4
Find all the clues in Nemzya
Complete Chapter 3
Answer 40 Knowledge questions
Take seven demons to your service
Collect 30 bailichkas
Guess the road in the cursed forest
Read 77 entries in the Onomasticon
Gather 33 herbs
Complete Chapter 2
Release the Mermaid
Complete Proshka loyalty quest
Complete Old Egor loyalty quest
Cow level
Answer 25 Knowledge questions
Release seven dead men
Complete White Head loyalty quest
Collect 30 encyclopedia entries
Win 3 times in a card game while cheating
Gather 13 herbs
Negotiate with Susedko on Zemskaia station
Complete Chapter 1
Guess all the Obderiha riddles with the first attempt
Collect 10 bailichkas
Complete Nikolay loyalty quest
Answer 10 Knowledge questions
Win 5 times in a card game
Collect 10 encyclopedia entries
Complete the Prologue
Collect 4 copies of each card
Don't release the Mermaid
Meet your beloved one
Become a mistress of Hell