Do the books focus on any particular Aqidah?
As the target audience for Safar textbooks are children, we tend to avoid any academic or technical discussions that are not suitable for the intended age range.
So, even though core Aqidah issues (accepted by the Ahlus-Sunnah wal Jama'ah) are emphasised in our textbooks, peripheral issues - where there may be divergences between schools - are generally avoided.