Any resource which reveals new information to you in a way that is not too complicated to digest is a good one. However - I would stress that the best learning resource you have available to develop your artistic eye for anatomy is your own body and observing people in the world. Keep a notebook of observations you make - writing it down is important to help you remember the information, even if you don’t read it again, I’ve found. You should combine these observations with studying anatomy in resources like the ones you are seeking.
For example, some of the things that really stick are self made observations like: The length of the Femur from its outter extreme edge (not the socket) is approximately the same length from the bottom of the femur to the heel, and is also very close to the distance between the top of the shoulder joint (not muscle) to the forward tip of the Illiac crest when the arm is down and relaxed. A simple landmark measurement for the face is that distance from the hairline to the eyebrow is the same as the eyebrow to the bottom of the nose, and from the bottom of the nose to the point of the chin. Generally - the distance between eyes is the width of one eye - things like this. I’m beginning a list of observations like this that I know will help me in my mind as I work.
Watch people in the world walking when you are out and about, make mental note of the large and small angles and forms - you’ll begin to see patterns and regularities as well as variations. All of it helps. 
While we all vary as humans we all also have the same structure - knowing how to build that will give you ways and ideas of how to stretch it to make the uniqueness of a character.
Separate from that, its rather dated now in terms of video but I’ve found the Acland’s DVD atlas of human anatomy to be hugely informative. Its not built for artists but for people in a medical or surgical field, and teaches you in extreeme detail the body from the inside out using actual cadavers (which may gross you out - so be careful if that will make you uncomfortable). Its true that you certainly don’t need to know all the things in there, but in my view the more you know the better - it doesn’t hurt to be more detailed in your study.