To set the reading challenges you're likely seeing post to your dashboard from your followed booklikers, it's at http://booklikes.com/goodies/readingchallenge .  If you lose this post/link, it's under "goodies" on the main menu (so is the Reading Challenge widget code for your blog, direct link http://booklikes.com/goodies/widget ).

Click the "read more" if you're in dashboard view and you'd like creenshots (you'll still stay on booklikes without being redirected to another website/blog):

The reading list feature fo booklikes is at http://booklikes.com/apps/reading-lists or you get to it by selecting "apps" from the main menu.   Screenshot:

If you tell booklikes to add all books from the reading list, it creates a shelf named the same and adds them.   Unlike listopias on goodreads, the lists don't show on the book pages and the list creators manage (you can comment to request updates or discuss something).  No voting campaigns or paid promoters gaming the lists, yay!  Example screenshot from reading list Read Alike List for "How It Went Down" 2015 Coretta Scott King Author Honor Book :

How do I tell from the book page, when editing my shelves or search results that I've already shelved a different edition of the book?

UPDATED WITH AN ANSWER:  ( thanks to Tannat's comment) On search results you'll see a vertical green bar if you've shelved an edition.  (Still not sure about on book page).  Screenshot showing bar:

For example, when I am updating my shelves, someone's post has me click open a book page or maybe do a search on ISBN of book in hand.

(When my edition has been correctly combined, of course.  I realize if there are stray editions that I first need to click "report" and ask a librarian to combine with correct work.  And that there's a known bug where the narrator name as author causes audiobooks to not combine with their print/ebook editions -- again that should be reported to get combined and edition edited so narrator says narrator instead of author.)

The large bookcover at left (dashboard view) you get by choosing "post" on book pages, "update and publish" on currently reading display or by pressing the large "plus" sign when creating/editing posts. 

If in the text of your posts you want to link to book page (like Runaway Robot - Lester del Rey ) or with book cover thumbnails like:

.       

 then read on for screenshots and instructions.

Just a head's up - If anyone wants to save any info from my tutorials (meagre as they are) now would be a good time to save it.  With the new layout all my screen shots to show the steps to make changes are useless so there's not a lot of need for them if they don't make sense.

Ah well, it was fun while it lasted...

*Edit*  -  Hahah, now that I'm seeing my post title show up on my notifications it reads like a flounce, lol.  "...and I'm taking my tutorials with me!"  :P