Definitely possible! To do so, go to your ideabook, click Collaborate, then select private and save the setting by clicking "Update".

I was wondering the same thing.
I don't see collaborate or anywhere to make it private.
I view Houzz on IPad 2. (I don't if that makes a difference at all)

I also posted photos on discussion last night and was wondering if you have any tips to getting more feedback on posted photos?
Thanks.

Hi Roxannepete, To see the collaborate button, you will need to access the site through the web interface. You can actually do that through the Safari browser on your iPad.

For discussions, your best bet is to give your discussion a good title, really describe the issue you are having in the post, but the most important thing is to include photos with it. That gets a lot more attention from the rest of the community. Looks like your post is doing pretty well! https://www.houzz.com/discussions/help-desperately-need-ideas-for-my-kitchen-eating-area-dsvw-vd~298444