Besides the Bible, every Catholic home should have this reference texts!
This is the annual sale that USCCB offers on these titles. This is the Church’s equivalent of a back-to-school sale. Do it!
Now thru Sept 30 (yes, there’s a typo above, its not Sept 3, but the 30th) you can get 20% off hard copies of the Catechism (CCC), the US Catechism for Adults, the Compendium of the CCC, and the Compendium of Social Doctrine. Here’s a download of an online-form (.pdf) to use in ordering.
Use the promo code “faith”!