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