Tourist guide with attention on the layout

[Fingolas]

Hello to everyone, until today I was a silent reader of this board, but nevertheless there was much help for me to find here. So first of all I want to thank all of you discussing here and giving an insight into your work and ideas!

I'd like to show the book my company was working on for some weeks: It's a recently published tourist guide to Augsburg, a city in southern germany. Yes, it's only in german, but since I'm posting here to show the layout, I hope that's not a big problem.
I would really appreciate some opinions on the design and layout, because that's what I was responsible for. Also I'd like to know what you think about the layout of eBooks in general, because there aren't much eBooks out there that look nice and still work on different devices, or did I miss them?

Our book was built in Sigil with iBooks as central device in mind but always crosschecked with Adobe Digital Editions and Aldiko for Android. The final product looks almost exactly the same on iBooks and on ADE/Aldiko, the only thing missing on ADE is the zoom into the pictures and maps. Apart from that, I think we created a really nice looking book. I even kept Kindle in mind and think, that it also looks good as mobipocket (many thanks to Calibre for that).

What do you think? Here it is on iBooks (with the free Preview) and here for the Kindle (with some Screenshots and also a Preview).
The ePub itself is also available at epubli, but that's a german store without any preview.
Three screenshots of the iPad-Version are also visible in this german text.