The Preview Edition of KNOWING: Understanding Human Intelligence is an Adobe Acrobat PDF file. To open the file, you will have to have Adobe Acrobat Reader installed. Windows Users: Right Click to view a popup menu offering you the option to: Save Target As …. Mac Users: Right Click or Control Click to view popup menu options for: Download Linked File, or Save Link As …, or Save Link Target As ... . http://www.synearth.net/trust-2015/Restricted-Confidential/KNOWINGpreview.pdf