pretty much the pathfinder chronicler 

journal of the monster hunter

At 3rd level, you gain the monster hunters journal which you can use twice per  short or long rest in two ways you choose at this level in addtion when you use it and the target has a tag you can add the tag to the journal while you have the tag in your journal you treat monsters of that tag as a favored enemy you can expend the tag to use the journal on a monster of that tag 

(you do not gain a tag when you expend one and you lose all tags when you take a long rest and you lose 1 tag of your choice when you take a long rest)k

aim for the week spot

choose a monster within 30ft of you all attack rolls against them until the end of your next turn 

encyclopedia

ask the dm a number of qeustions that can answered with a skill check up to twice your wis mod these questions are made with advantage 

halting weakness

make an attack roll with wis bonus  against a creature within 30 ft of you on a hit they take 1d8+your wis mod psychic damage and cannot move until the end of your next turn 

inspiring tale

choose a monster within 30ft of you and tell a tale about there kind then choose a number of peaple up to your wis mod in 30ft who can hear you they gain inspiration as if you were a bard of your ranger level 

deep pockets

At 7th level, as part of a long or short rest you can pull up a any item of a combined max worth of 5 times your ranger level in gold including potions and scrolls but not any other magic items 

improved journal

At 11th level,you gain more ways to use your tags in addtion at a long rest you can gain a tag choose 3 of the new tag use options 

charged with doom

expend a tag as an bonus action when you strike a monster of that tag to add 1d8 of a type it is vunarable to the strike if it is not vunrable to any damage types the strike becomes magic 

deactivating strike

you can spend a tag from your journal as a bonus action when striking a creature of that tag to stun the creature 

deadly strike

expend a tag as a bonus action when you strike a creature with that tag to cause it to crit if it hit and hit if it missed 

healing inspiration

same as inspiring tale  but used only with tags and on monsters of that tag and all inspired creatures heal your ranger level in health 

improved encyclopedia

same as enclyclopedia but can only use a tag and can only be used on a creature of that tag and you ask three times your wis mod in questions 

known attack patterns

expend a tag in your journal as a reaction when a monster with a that tag attacks you to dodge the attack and move 10 ft 

master journal

At 15th level, you gain another journal use and another tag use you can also once per long rest use 3 journal uses at once