Michael, I note you're in Spain. The link maker only works for books in the US store. There is also a version, I think, for the UK store. I'll alert Harvey to these last few posts -- not sure if he can do one for other stores or not. (The link in your immediately preceding post shows 'not available' but if I click 'kindle edition' I see it.)
When I use link maker with the title, I find it. When I use this ASIN: B00AHNIGHO I find it. That's the ASIN on the book that I get when I click 'kindle edition' as above. I bet you're using the Spain store ASIN.