@bishop3101 I’m studying human anatomy with these books:
1) Michael Hampton: Figure Drawing – Desgin and Invention
2) Gary Faigin: The Artist’s Complete Guide to Facial Expression
3) 3DTotalPublishing: Anatomy for 3D Artists – The Essential Guide for CG Professionals
The techniques presented in these books differ more or less, especially when it comes to the proportions of a human head which can be quite confusing, but I think we have to take the rules presented in these books as an approximative orientation and do the rest with our intuition which we develop by practising as much as we can. I haven’t much practice yet with creating complete characters (more with heads), but all professionals tell you that they can only give you recommendations and that it’s your part to develop your skills by practising. The last book in the list above offers a very detailed description of the human sceleton and muscles and uses sculpting for creating a character before retopologizing it.