Among the ~40 ebooks I have from O'Reilly, only one is not available in PDF : "Excel 2013 Formulas" by John Walkenbach. Is there a reason for this ?
It's quite annoying since I use exclusively PDF (and actually I don't have other options at work, where I don't have admin rights to install software). The preceding edition, "Excel 2010 Formulas", doe not have this problem.
Help get this topic noticed by sharing it on Twitter, Facebook, or email.