Taiwan Travel Guide China Knowledge Base

Are western travel books on the following countires banned in China? Taiwan:- Simply because they don't say its province of the P.R. China or Mongolia due to them breaking away and becoming independent. The reason why I asked is because I went to the big English book store in Wangfujing street, Beijing. They had every book it seems in the rough/lonely planet guide apart from these two, or in any kind of guide. At the same time some one else made the a comment about having no Taiwan guides. Are they banned or I'm I just being silly.
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