A warning that I wish I'd known: In order to get all of these,
you must not embrace certain characters, at least before you obtain their particular collectibles. This is especially important if you are going for the London's Burning achievement and turning areas hostile as you progress.
In other words, if you are doing a scorched earth playthrough (like I did), you will not be able to complete this achievement. Oops.
Here are the specific ones you need to keep alive (or you can just be smart and keep everyone alive until the end):
*** Spoiler - click to reveal ***Whitechapel - Mason Swanborough. You need to complete his Braille book quest.
West End - Usher Talltree's investigation. IMPORTANT: DO NOT READ THE DIARY.
Docks - Martin Nightingale. Purchase this from him.
Pembroke Hospital - Mortimer. Follow his quest, and it is in his house.
Also, huge story related story from Chapter 5:
*** Spoiler - click to reveal ***You CANNOT KILL Aloysius Dawson, or the district will turn hostile, killing important characters. You will have to turn him instead, since you need to deal with him to get to Chapter 6.
In general, just don't kill anyone you don't need to, although it means you won't level up quite as quickly. Don't mess up like I did.
I don't have guide that I've made myself, but I was following a text guide here:
https://gameranx.com/features/id/152452/article/vampyr-all-l...There is also a video guide here:
https://www.youtube.com/watch?time_continue=967&v=tOhP20...