Here is a list of all documented files with brief descriptions:

inkcpp
include
choice.h
functional.h
globals.h
list.h
runner.h
snapshot.h
story.h
story_ptr.h
traits.h
types.h
inkcpp_c
include
inkcpp.h
inkcpp_compiler
include
compilation_results.h
compiler.h
shared
public
config.h
system.h
version.h
unreal
inkcpp
Source
inkcpp
Public
InkAsset.h
InkChoice.h
inkcpp.h
InkDelegates.h	Collection of Delegates typs used for the UE interface
InkHandles.h
InkList.h
InkRuntime.h
InkSnapshot.h
InkThread.h
InkVar.h
TagList.h