Originally Posted by Pranananda
Under the PDF preferences in Calibre, there is a Line Unwrapping Factor you can play with.
If that doesn't work for you, you might try the PDFReflow utility described in the PDF forum. It works with text based PDFs, and it works with text only documents with relatively simple formatting, which covers most fiction.
If neither of these solutions work, Adobe Acrobat is a good solution, but it is not free.
Well I do have purchased copy of Acrobat, could you tell me the steps I can perform to solve it?
Meanwhile I will try the other recommendations.