The download page states download for Mac or Windows or get on iBooks.
The exe is a zip file that contains the PDF files and example databases files. You will need abode reader to open the PDFs. When you click the exe file a Folder named Filemaker 15 Training will be created, a sub folder call Activity Files with a PDF named fts_basics_fm15_en.pdf which is the ebook. After Adobe is installed, just click the pdf file and it will automatically open in Adobe.
Thanks man !