Graveyard Keeper

Just so people are aware the books you can buy from the "Astrologer" that award points do not seem to count towards this achievement. I got myself to 99% then bought 75 points worth of books and it did not unlock.

Happy hunting!

Edit: The ways I have found for grinding blue points are as follows:

Making glass in the furnace gives 1 point [6 sand and 1 water]. This can then be converted into conical flasks for 1 point [2 glass] and then advanced conical flasks for 1 point [3 conical flasks and 1 water].

Making softcovers [2 pigskin paper ] you can then turn softcovers into hard covers granting 5 points [1 softback + 1 tanning agent + 1 faith]. This method is a little more complicated as it requires alchemy far enough along for the distillation cube and alchemy workbench II to make the tanning agent with slowing powder (hops / pyrite / spider web), death solution (dark brain / black jelly) and order extract (green jelly / white flowers).

These hard covers can also be upgraded then from the copper star variant to silver star for an additional 5 points [1 hard cover bronze + 2 steel parts + 2 faith] and then again upgraded to gold star for another 5 points [1 hard cover silver + 2 gold jewelry details]. This is personally how I did the bulk of my grind, however I would only recommend upgrading to silver star if you have the resources to hand as it's probably not worth the time to grind more steel for the point return.

As Kimitchii has pointed out in the comments making books can be a very good source, I also personally used this method. Creating stories for 1 point [1/10th of pen and ink + 1 paper + 5 faith], each story can be converted to notes for 3 points [1 story + 1/10th pen and ink + paper], and then 3 notes to a chapter for 5 points [3 notes of varying quality]. Lastly make a book giving 15 points [1 softcover / hard cover + 1 chapter].

I would recommend using any stories you may have saved up for this to make the whole process a little quicker and would also recommend having the printing press to produce paper as you need pigskin to make the softcovers to start the process.

You can also research certain items under a buff provided by both cakes and grape pies, however from experience the buff seems to provide 1 additional point no matter the reward (e.g +1 point to an alchemical product which is 5 base or +1 to a gravestone that is 70 base).

Hope this all helps!

Disclaimer: When the game updates there will probably be items missing from the list below. If you notice something missing or wrong please let me know and I’ll add/change it.

Preface:
- I recommend making the Combo Prayer ASAP. You’ll need lots of Faith to study all the items listed below and this prayer will get you a lot more Faith and money than the basic prayer.
Bronze = 50% more Faith/money, Silver = 100% more, Gold = 150% more
- As soon as you get enough money, start visiting the Astrologer each week to buy his 25pt blue books for 5 silver. These won’t count towards the achievement but are very useful for progressing.
- Research stone and marble technologies as soon as possible. Studying the graveyard decorations grants you almost twice the amount of blue points that you spent on the technology.
- After studying everything in the game that gives blue points you’ll be close to ~2,000 pts so you’ll need to craft items to make up the other ~1,000 pts (if you’re filling your graveyard with 12 white skull corpses from embalming you’ll need lots of marble decorations which will get you the 1,000pts eventually)
- You can bake a Cake that will grant a buff giving you one extra point when studying items but it's minimal so not necessary.
- Make sure to take a lick of the Golden Apple that Snake makes you get from lvl 15 of the dungeon. You get 100 blue points that DO count towards the achievement.

Early game easy points:
- Studying body parts and grave decorations (listed below)
- Buy Hemp Seeds from the hobo Dig a lot of days in a row then grow Hemp to turn into Hemp Rope at the Church Work Bench. 4 Hemp = 5 Hemp Rope = 1 blue point
-Research Glass and Glass Blower technologies to make Conical Flasks granting 1 blue point each. (save the flasks since you’ll need a bunch later on to make embalming injections)

Study (number is amount of blue points granted):
20 Blood
10 Bone
50 Brain
20 Fat
20 Flesh
50 Heart
50 Intestine
20 Skin
20 Skull

(Progress far with Inquisitor questline to unlock dark organs)
150 Dark brain
100 Dark heart
150 Dark Intestine

20 Gravestone
30 Gravestone 2
80 Marble cross
90 Marble cross 2
80 Marble grave fence
90 Marble grave fence 2
150 Marble plinth
150 Marble sculpture
150 Marble sculpture 2
30 Stone Cross
30 Stone cross 2
20 Stone grave fence
30 Stone grave fence 2
30 Stone plinth
50 Stone sculpture
50 Stone sculpture 2
20 Wooden cross
20 Wooden grave fence
10 Wooden marker

Powder, Solutions, and Extracts: the majority of them
give 5 blue points when studied so I won’t list them all here.

Crafting (points each time you craft an item):
Hemp Rope from Hemp = 1 point
Conical Flask from Glass = 1 point
Advanced Conical Flask from CF = 1 point
Story from Pen&Ink+Paper+Faith = 1 point
Notes from Stories = 1 point (need 3 for a Chapter)
Chapter from 3 Notes = 5 points
Book from Soft/Hardcover+Chapter = 15 points
A Piece of Marble (Marble block+Wooden Wedge) = 1 point
A Polished Brick of Marble = 1 point
A Carved Piece of Marble = 2 points
Marble Sculpture = 10 points
Marble Sculpture 2 = 10 points
Marble Plinth = 10 points
Porcelain Funeral Urn = 2 points
A Polished Brick of Stone = 1 points
Stone Plinth = 3 points
Stone Sculpture = 5 points
Stone Sculpture 2 = 5 points
Embalming Injections = 3 points
Gold Jewelry Details = 1 point
Jewelry = 1 point
Steel Parts = 1 point
Steel Chisel (any rank) = 1 point
Lens = 2 points