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