Digital Strategy written by Pere Rosales, the best book about online business that I have read in years. Believe me, I’ve read a lot! I started reading the January 1st at 2am and spend all night long reading it. Clear, direct and fully updated to what is applicable today. http://estrategiadigital.org/
Unfortunately, only in Spanish … Eyy international publishers you have a top sales here!!!
In addition, many of the ideas proposed in the book can be immediately put into practice with Zyncro.