You have seen Titus' name mentioned several times already in your studies. He was the Gentile that the Jews wanted to have circumcised in Jerusalem, but Paul would not permit it (Galatians 2:1-5). He was the one eager to help the church in Corinth (II Corinthians 7:15 and II Corinthians 8:17).
Paul writes to explain why he had Titus stay in Crete. Go ahead and read Titus at this time.
Philemon is another of Paul's letter recorded in the New Testament, but not the last letter he wrote chronologically. (That honor belongs to 2 Timothy.) Philemon was written in 60 A.D. regarding a slave by the name of Onesimus who ran away from Philemon. Paul explains how the situation ought to be handled. Please read the letter of Philemon.
Tomorrow's reading is the book of Hebrews. Since it is quite long, you may want to read the first five chapters today and finish the rest tomorrow. Or you can try reading all of it tomorrow. Do it whichever way you are most comfortable with. Hebrews is the only book in the New Testament whose authorship is unknown. Some believe the theology is from Paul, but the writing style is not. Hebrews 2:3 infers that the writer is a second-generation Christian, which would exclude Paul. Regardless of who the author is, the writing is obviously that of a God-inspired man and aligns with what the rest of the New Testament teaches.