No. The book of Hebrews was not even attributed to Paul until later in the second century, and biblical scholars now recognise that Hebrews has really nothing in common with the works of Paul, and even differs markedly in style and theology. Only the most conservative Christians continue to believe that Hebrews was written by the Apostle Paul.
Apostle Pauls last book is the letter to the Hebrews.
Paul Annixter
The last book of the bible that Paul completed was the book of 2 Timothy in 65 C.E.
Most biblical historians agree that Philemon is the last "authentic" epistle written by the historical Paul (in about 62 CE)
Jefferson wrote to Roger C. Weightman on June 24, 1826.
hebrews
Paul Gauguin
Thirteen 'epistles' or letters have been attributed to Paul. Hebrews was also at one stage attributed to him, but that is clearly not the case. It was never attributed to him until late in the second century.At least seven Pauline epistles are widely considered to be genuine, and of these five have been shown by computer analysis to contain exactly the same writing or dictation style: Romans, 1 Corinthians, 2 Corinthians, Philemon and Galatians.The two that may, with some confidence, have been written by Paul, but do not match the style of Galatians are Philippians and 1 Thessalonians.
Another answer from our community:The latest book traditionally known to be written by Paul is 2Timothy, written in 67AD before his martyrdom. However, Hebrews is internally-dated to have been written between 67-69AD . It is Pauline in character and if, as some believe, Paul wrote it but wouldn't identify himself to the readers, it would make Hebrews the last book of Paul's. (It was much earlier than Revelation written by John 94-96AD.)
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AnswerAs far as practicable, the epistles attributed to St Paul were included in the New Testament in order of length, with the longest letter by Paul, Romans, first and the short letter to Philemon placed last. So, although Paul did not write that this would be his longest letter, its placement shows us that it is the longest epistle of Paul.