Question: Who wrote the book of 1 and 2 thessalonians?

Disambiguated questions and answers:
context: The Second Epistle to the Thessalonians, commonly referred to as Second Thessalonians or 2 Thessalonians is a book from the New Testament of the Christian Bible. It is traditionally attributed to Paul the Apostle, with Timothy as a co-author. Modern biblical scholarship is divided on whether the epistle was written by Paul; many scholars reject its authenticity based on what they see as differences in style and theology between this and the First Epistle to the Thessalonians.
question: Who is traditionally said to have written 2 Thessalonians?
short_answers: Paul the Apostle, with Timothy
wikipage: Second Epistle to the Thessalonians
context: Many modern scholars agree with Ehrman that 2 Thessalonians was not written by Paul but by an associate or disciple after his death. See, for example, Beverly Roberts Gaventa, Vincent Smiles, Udo Schnelle, Eugene Boring, and Joseph Kelly. Norman Perrin observes, "The best understanding of 2 Thessalonians ... is to see it as a deliberate imitation of 1 Thessalonians, updating the apostle's thought." Perrin bases this claim on his hypothesis that prayer at the time usually treated God the Father as ultimate judge, rather than Jesus.
question: Who do many modern scholars argue wrote 2 Thessalonians?
short_answers: not written by Paul but by an associate or disciple
wikipage: Second Epistle to the Thessalonians
context: The First Epistle to the Thessalonians, commonly referred to as First Thessalonians or 1 Thessalonians, is a Pauline epistle of the New Testament of the Christian Bible. The epistle is attributed to Paul the Apostle, and is addressed to the church in Thessalonica, in modern-day Greece. It is likely the first of Paul's letters, probably written by the end of AD 52 (however, some scholars believe the Epistle to Galatians may have been written at an earlier date: AD 48).
question: Who do most scholars say wrote 1 Thessalonians?
short_answers: Paul the Apostle
wikipage: First Epistle to the Thessalonians

Long-form answers:
knowledge: content: Timothy became St Paul's disciple, and later his constant companion and co-worker in preaching.
wikipage: Timothy of Ephesus
long_answer: The first and second thessalonians or 1 Thessalonians and 2 Thessalonians respectively are commonly attributed to Paul the Apostle, however, there are a number of modern scholars who believe that Paul may not have written these books but they may have been written by an associate or disciple of his, perhaps Timothy.   
knowledge: content: In his book Forged, New Testament scholar Bart D. Ehrman puts forward some of the most common arguments against the authenticity of 2 Thessalonians.
wikipage: Second Epistle to the Thessalonians Opposition to authenticity
long_answer: The First Epistle to the Thessalonians, commonly referred to as First Thessalonians or 1 Thessalonians, is a Pauline epistle of the New Testament of the Christian Bible that is attributed to Paul the Apostle. The Second Epistle to the Thessalonians, commonly referred to as Second Thessalonians or 2 Thessalonians is a book from the New Testament of the Christian Bible is traditionally attributed to Paul the Apostle, with Timothy as a co-author. Many modern scholars agree with New Testament Scholar Ehrman that 2 Thessalonians was not written by Paul but by an associate or disciple after his death.