Error opening iWorks files on OS X

[scarver2]

I am getting an error when attempting to access the iWorks files. I realize this is because OS X stores the file group extracted into a folder even though it appears as a single file. How can this be overcome?

yomu = Yomu.new 'sample.pages'
yomu.text

generates this error

Errno::EISDIR: Is a directory @ io_fread - /path/to/test.pages
    from /gems/ruby-2.1.2/gems/yomu-0.2.0/lib/yomu.rb:173:in `read'
    from /gems/ruby-2.1.2/gems/yomu-0.2.0/lib/yomu.rb:173:in `data'
    from /gems/ruby-2.1.2/gems/yomu-0.2.0/lib/yomu.rb:85:in `text' from (irb):15
    ...