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