Rob Kardashian gets strange reaction over sweet post for Khloé (PHOTO)

For the most part, Rob Kardashian has removed himself from the public eye, but he was willing to break his social media silence to show support for his big sister, Khloé Kardashian.

More:Even Khloé Kardashian loses her cool with Rob and his weight issues

Khloé’s new book, Strong Looks Better Naked, is now on sale, and in it, she gives some insight into just how bad things are for her brother, who has been struggling with weight loss and depression. She wrote, “…he fell into a deep, dark place and couldn’t find his way back. I’ve tried to help him, as has the entire family, but our efforts have largely been in vain. From time to time, though, he decides he’s going to fix things his way, and he plunges in headfirst. Inevitably, it doesn’t work.”

But Rob clearly couldn’t be prouder of his sister’s memoir.

Taking to Instagram, he shared a picture of Khloé’s book, along with a supportive caption. He wrote, “I’m in love with the Koko!!! Check out my BEAUTIFUL Sister’s new book, out TODAY! #StrongLooksBetterNaked GET IT NOW http://bit.ly/1M6hgwy.”

But some critics have taken issue with the caption, telling Kardashian that his comment is “so creepy.”

User breakinbank also shared their thoughts, writing, “when you advertise your naked sister.”

But not everyone feels that way; some people see the message as it was intended: sweet and loving.

More:Khloé Kardashian’s new talk show releases update following Lamar Odom scare

“Your [sic] such a sweet brother ox,” tashsugarfairy wrote. “aw loving rob giving some public love,” another fan wrote.

And some fans have a career suggestion for Rob; they think it’s time he wrote his own book.

“We need a book from you Rob! Miss u on the show,” amykeor shared.

Do you agree? Should Rob write his own book? Do you think his comments about Khloé were sweet? Let us know your thoughts in the comments below.