15: guadalajara

16: 660162831 - numerical code of the countries (Anguillas,Christmasisland,Guernsey)

17: Thames voice hapless most - those words where different then in the orginal poem

18: nietzsche - image is binary code

19: heart of darkness - name of the source book

20: "feynman" by changing URL of image from /wrong/ to /right/

Don't want to post any V2.0 solutions. Obtuse hints only:

21: try, try again.

22: remember level 10?

reached level 22. Any more hints?

Look carefully. You may be missing something important.

Revisit level 10 for some ideas where to look.

is it writing a message in signal, telegram or something like that if yes which one to frank underwood for the underwood machine plus the tap tap tap. :( I'm confuse. also I was thinking about the famous writers that own a underwood machine

ohh it was more simple that all that I was thinking...

i'm really stuck on level 22, any hints? i got "yes!" and "it is" and i've tried stuff but can't think any further

Yes, think outside the "box"

what box??? is it like the black rabbit?

ROT13: Jung unccraf, jura lbh frr "Lrf, vg vf!" ba gur fperra, naq lbh fryrpg gur jubyr UGZY cntr?

arghhhh seriously, that simple?

...

Damn, that's savage sharing all the answers ... where's the fun

Any tips for level 26? I've been playing around with the idea that the three numbers represent coordinates but without much luck. Also, the 'inverse' thing is throwing me off.

How you got this? I tried T9, Polyphonic Ringtones, even tried to get a symbian simulator cause i thought its something in the menu.

I took the numbers in the URL and pressed them the number of times shown by the numbers below the image.