Implementing Prolog in C or C++

I was wondering how would Prolog implementation in C or C++ look like. I am mainly interested in building it as a C or C++ library, though the interpreter app would also do. I am interested in reading about its internals, namely query execution i.e. finding the solutions and the associated datatypes involved. I would be glad if you recommended me any readings on topic or for any direct suggestions/advices. Readings might be for other OOP languages or for general OOP as well. Most exhausting material will solve the question.