Aykut, I like it.
It is apparent to me that you've spend a lot of time editing the photos and there are a lot of excellent photos in your book especially those depicting people's daily life.
It's also nice to see another interpretation of the photo association concept. I have previously published a blurb book exploring the same concept.
If you allow me two suggestions:
1. Divide your book to several chapters or sections. I can see distinct scenes and subjects in your book that will make neat themes like lines, people, landscapes. This gives a sense of anticipation (if you choose to title the chapters), and also gives your readers a nice break between chapters.
2. Totally personal preference, for photobooks, I like white background with the photo centered in the middle. Why? because it gives the photo a nice separation from the table (or wherever the book is viewed on).