Yes! There are a few ways to achieve this. Your best options are exporting an interactive PDF or sending your clients your BMML files and images directly.
Share PDF document
To create an interactive PDF, all you have to do is open all the mockups you’d like to package together, link them up if you want and “Export All to PDF…” from the File menu. A single PDF file will be created, with a mockup on each page and even interlinked pages, if you've used the linking feature of Mockups!
Share BMML files
Another way to share your work is to zip up all of your BMML files (and image folders if you have any) and send the package to your clients, along with a link to download mockups: http://balsamiq.com/download.
Tell your clients to unzip your package, install mockups and open your main bmml file.
They will be able to go full-screen and click around, or open all the BMML files at their leasure and look around.
During the trial period they’ll be able to make changes and save them.
When the trial expires, they won’t be able to save but they’ll still be able to click around, zoom etc.
Share PNG images
Lastly, you can export all of your Mockups to PNG images that you can send to your clients. More info about that feature here.