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