Jpeg to Pdf

I just converted some 17 jpg files to pdf from this wonderful website www.pdfonline.com I scanned some pages of the book and converted to jpg format only to discover that the place where I had to print had no image viewer software other than Microsoft paint and though it did read the jpg file correctly, printing it was a nightmare. Then someone asked me to show how to convert a doc file to pdf file and I showed him that it can be done online. Then suddenly this thought crossed my mind why don't I convert those jpg images to pdf. The site did a wonderful job by sending the file within a minute of uploading. As a side note if you are scanning a text book scan with high contrast and low brightness !