The Barnabus Project by Terry Fan; Eric Fan; Devin Fan

Barnabus was part mouse and part elephant.  He was a toy that didn't turn out quite right but he had lots of company.  They ate the food they were given and lived in their containers peaceably.  But then one day they marked them all with a red sticker that said "failed".  They were going to be remade...

Tundra Books and Net Galley let me read this book for review (thank you).  It will be published on September 1st.

Barnabus says they need to escape.  They tell him it's impossible.  He hits the glass wall. smashes into it and kicks it with no results.  Then he sits down and lets a cry of frustration come out.  The glass at the top has cracked.  So he makes a really loud noise and he's free!

They work as a team to get off the shelves and head out for freedom.  But the humans are after them.  Will they get free?