Foxit PDF Reader is the only eligible alternative reader/viewer for PDF files (eBooks). Its free, smaller, faster, and cleaner. And it starts up immediately, so you dont need to wait the annoying Welcome screen to disappear. Foxit PDF Reader is extremely easy to use, just double click it to start and then click open button to open your PDF document. If you want to print, click on Print button. If you want to setup the page layout for printing, select Print Setup from File menu. Foxit Reader supports Windows 98/Me/2000/XP/2003/Vista.
Unlike Adobe Reader, this one has size about than 2.5 MB, needs no installation and opens up immediately. You dont need to go throught lengthy installation process to start using Foxit PDF Reader, just UNZIP the downloaded pdfrd.zip package into any place you want, then run PDFReader.exe. You can set Foxit PDF Reader as your default PDF reader, so you can double click on PDF files to open them within Foxit PDF Reader.