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