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