Hardest origamibook out today?

[camicazi]

I I trying to find a really hard origamibook as a christmas gift-idea for my parents, but I dont know if there are any books that are harder than kamiyas book out yet. Can you guys name a book that is harder, or if there isnt, then a book that is special in some way, I would like complex ones but it doesnt have to be. I already have kamiyas book, all langs books and a tanteidan collection.All suggestions are really welcome.

[akugami]

without any doubt i would recommend the last book published by nicolas terry: http://www.origami-shop.com/de/buch-ori ... -1900.html

[polistes]

victoria and Vladimir serova's Book

http://www.origami-shop.com/en/origami- ... -1155.html

[gordigami]

It's kindof like buying a yacht. If you have to ask the price, you probably can't afford it .
Conversely, if you are experienced enough to fold complex models , and fold them well enough to give credit to the designer, then you should already know what the best models are .
The key is to fold at a respectable level of competency , rather than struggle through many steps , only to finish with an unrecognizable mashing of paper.
I would always recommend any of Roman Diaz and Quentin Trollip's books .
To do them well, generally requires diligence and folding many models again and again until they finally compliment the designer's intent .
Only a fool would labour slavishly through 130 steps, produce a boulder of crumpled paper, simply so that he can say that he completed it .
I'm sorry if this is a bit harsh, I'm actually trying to help you advance in this noble art .

[Axel´s Origami]

If you can fold all of lang and kamiyas stuff then i recomend trying out cps!

[jeko]

Also pretty complex:
Manuel Sirgo Álvarez - Origami Bugs and Beasts
Manuel Sirgo Álvarez - Origami Menagerie: 21 Challenging Models