Reaching The Target Audience

One thing I still find kind of tricky with establishing my audience as an indie author is reaching the target audience of the Titan series, which is the teen and pre-teen market mainly the 9-12 age group. How do I find a way to get my book sin their hands? So far, I have done very well with that age group (big sigh of relief), but how do I extend that reach further? I did get into a few schools and public libraries, but is there something there I am missing? All I can think of now is to try and reach even more schools over the summer and maybe get into a few for readings/presentations come September. I do want to also try and include Titan products such as posters, stickers, and colouring books for kids, but again, how do I reach them to offer those? This will be my biggest hurdle as I prepare to market Titan 2.