Series Ender Challenge

I realized that I read a Series Ender awhile back, but had forgotten to post it.  I also just finished one!  So, here they are:

• United We Spy by Ally Carter
• Urchin and the Rage Tide by M.I. McAllister

 And I know this probably won't count, but I did read the last Knuffle Bunny book in June (I think).  Yes, it's a picture book, but it is a Series Ender!  :p  Just in case...

• Knuffle Bunny Free by Mo Willems