I recently finished reading Archbishop Gomez’ Men of Brave Heart: The Virtue of Courage in the Priestly Life. There is plenty to digest and reflect on in this work, and a good number of practical suggestions for priests.
Archbishop Gomez draws heavily on St Thomas Aquinas, and a variety of other sources. The footnotes are extensive with plenty of leads to other material for the interested reader.
This book would make an excellent Lenten read for a priest, and indeed would be a great gift for your Parish Priest!