Question: Planning on writing a picture sci-fi book about Utopia.
The book will not have a plot (story), sequence or any conclusion. It will have approximately 30 illustrations generally depicting a search for Utopia, accompanied by minimal text for each illustration. Similar to a photo book.
Has anything similar to this been published before?
Could this spur sufficient interest?

Answer: 
**You really don't know.**

But here's the thing. There are 7.5 billion people on the planet. Let's say that you want to sell 100,000 copies. 

That means you only need to be interesting to 1/75000 people. 

Your story interests **you**. Are you so special that you find something interesting that 75000 other people **don't**? Maybe. Who knows. 

Just write the thing. You have so much ahead of you in that process... and it will so look different at the end from where it's at anyway. Just write it. Don't let fear that 'people won't like it' stand in your way.
What is interesting to the reader completely depends on the reader (the targeted and reached audience). For instance, people at a library will like different kind of books than people commuting by train.

The only way to know if people find your book interesting is to let people read your book (or parts of it, and then hope it represents the full quality of your book).
Let 10 people rate your book (chapter) on a scale from 0 = most boring stuff I've ever read to 10 = most interesting I've ever read. Let 10 other people rate a book with a similar amount of pages. Don't disclose which is your book. Then perform a T-test between the two groups.

If you're targeting a wide audience use popular narrative techniques. You might look at popular recently publicized books for techniques and constructs.

If you're targeting a niche audience, use in-group language and technical terms. Communicating with an in-group language that is understood by the reader gives a sense of belongingness.

If target audience is only one person writing an interesting book is the easiest. When there are 2 or more persons there will always be disagreement.