adobe digital edition to pdf

  Hi, I just bought an e-book and i downloaded it and it was downloaded as Adobe digital edition 4.5. 

  I would like to translate this to a PDF file. But it seems like you can only do this by paying different translation tools. for instance, Epub for instance charges 25.00 to translate all 100% of ADE files

 I also wonder if maybe ADE might be better for school than PDF?

thanks for any advice or suggestions