Hi Skylark,
As stated in our website, online store, and also in our forum, Little Reader and Little Math are compatible with Windows systems. We have tested LR and LM to work with Windows XP, Vista, and 7 (both 32 and 64 bit), but unfortunately we have yet to actually test our software on Mac and Linux systems.
You may have seen from old Mac/Linux topics here at the forum that some users tried installing LR/LM in Linux using a Windows emulator, and if you have a software like this perhaps you can try too? Please note that we cannot provide a 100% solution for Linux users (and even for Mac users) because our software is not designed nor tested in these systems (at least for now) -- but we will help you out as much as we can!
I hope this answers your question