I've recently learned a bit of the ruby language and have started a text-based game project to help me along with understanding it. The project has been going really well and I am wanting to branch off and start learning a bit of other languages. I have several friends who have studied CS and they have all expressed the value of C and Java so I thought those would be a good place to start. Could anyone recommend any good books that would help me get started? I have a functional grasp of Ruby, which, I've been told, is itself written in C and was wondering, also, if that would allow me to start with a slightly more advanced C book or if it would still be in my best interest to start from the very beginning.