The Catechism of the Catholic Church is something that all priests should be able to have quick access to. Most issues are found in the Catechism and does not require a PHD just to read it. It is also good however to have access to some of the other sources that the Catechism refers to. Here are some different sites where you can get the Catechism.

This is an easy word search in the CCC
The USCCB's version.
From the Vatican