How many XP books do you need to reach level 90 in Genshin?
FFXIV 6.4 Update to Level 90 Gear Progression Guide, End Game, ENDWALKER
Genshin Impact: 10 Best Characters to Level to 90 Guide - Fextralife
Genshin, Sacrificial Fragments - Best Character
I calculated how many days you need to fully max a character/almost fully max and how it compares to Genshin : r/HonkaiStarRail
Character Exp Chart and Leveling Tips - Genshin Impact - 1gamerdash
How to Ascend Characters - Honkai: Star Rail Guide - IGN
Level Your Characters Properly Genshin Impact
Genshin Impact: 10 Best Characters to Level to 90 Guide - Fextralife