LVCIVS DEI. Here are the CCC quotes regarding ordination.
Just one caveat concerning your book that I can think of here.
Deacons although are ordained, they are NOT ordained to the ministerial priesthood. Deacons are ordained to “service” but not as priests in a ministerial sense.
They are of course among the Priesthood of all of the Baptized faithful (just like I and presumably you are).
Hope this helps you and your book writing endeavor.
CCC 1541 The liturgy of the Church, however, sees in the priesthood of Aaron and the service of the Levites, as in the institution of the seventy elders,11 a prefiguring of the ordained ministry of the New Covenant. Thus in the Latin Rite the Church prays in the consecratory preface of the ordination of bishops:
God the Father of our Lord Jesus Christ, . . .
by your gracious word
you have established the plan of your Church.
From the beginning,
you chose the descendants of Abraham to be your holy nation.
You established rulers and priests
and did not leave your sanctuary without ministers to serve you. . . .12
CCC 1542 At the ordination of priests, the Church prays:
Lord, holy Father, . . .
when you had appointed high priests to rule your people,
you chose other men next to them in rank and dignity
to be with them and to help them in their task. . . .
you extended the spirit of Moses to seventy wise men. . . .
You shared among the sons of Aaron
the fullness of their father’s power.13
CCC 1543 In the consecratory prayer for ordination of deacons, the Church confesses:
Almighty God . . .,
You make the Church, Christ’s body,
grow to its full stature as a new and greater temple.
You enrich it with every kind of grace
and perfect it with a diversity of members
to serve the whole body in a wonderful pattern of unity.
You established a threefold ministry of worship and service,
for the glory of your name.
As ministers of your tabernacle you chose the sons of Levi
and gave them your blessing as their everlasting inheritance.14