the achievement:

• I got it on 2 different accounts after testing so it should be all of them
  
• I believe they count as you read them so you can load different saves if you miss any

update: removed notes disk from the guide since it's not really required for the achievement...

1. side work list

1. right outside the bathroom

2. on the structure near the trucks

3. church (go through the cornfield)

4. cornfield (follow the dog)

5. inside the van

1. mannequin room (start area)

2. ^ same room

3. save room

4. in the vent near the surveillance camera, take a left after passing by the kitchen

5. butcher's closet near the basement stairs (there are 7 notes)

6. barricaded room (start area)

7. passage to the food buckets room

8. entering the food buckets room closet leads to this room

9. room with the clock next to the scale room

10. outside the scale room go left until you get to this room

1. security room

2. pump room

3. cow room

4. kitchen door

5. refrigerator

6. storage

7. footlocker

8. lab 2nd floor

9. camera room lab 2nd floor

10. next to the red key slot