I found the thread, here are a few more books on the 1920s...
[ame="http://www.amazon.com/Anything-Goes-Biography-Roaring-Twenties-ebook/dp/B003QP4NVI/ref=sr_1_6?s=books&ie=UTF8&qid=1391206781&sr=1-6&keywords=anything+goes"]Amazon.com: Anything Goes: A Biography of the Roaring Twenties eBook: Lucy Moore: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51%2BtHcY5pnL.@@AMEPARAM@@51%2BtHcY5pnL[/ame]
[ame="http://www.amazon.com/New-World-Coming-Making-America/dp/0306813793/ref=sr_1_1?s=books&ie=UTF8&qid=1382313284&sr=1-1&keywords=new%20world%20coming?tag=upsideout-20&tag=5336612416-20"]New World Coming: The 1920s And The Making Of Modern America: Nathan Miller: 9780306813795: Amazon.com: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51vHV-8TyvL.@@AMEPARAM@@51vHV-8TyvL[/ame]
[ame="http://www.amazon.com/Only-Yesterday-Informal-History-1920s/dp/0060956658/ref=sr_1_1?s=books&ie=UTF8&qid=1382313338&sr=1-1&keywords=only%20yesterday?tag=upsideout-20&tag=5336612416-20"]Only Yesterday: An Informal History of the 1920s: Frederick Lewis Allen: 9780060956653: Amazon.com: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/415amN9HbTL.@@AMEPARAM@@415amN9HbTL[/ame]
[ame="http://www.amazon.com/Last-Call-Rise-Fall-Prohibition/dp/074327704X/ref=sr_1_1?s=books&ie=UTF8&qid=1382313467&sr=1-1&keywords=last%20call%20the%20rise%20and%20fall%20of%20prohibition?tag=upsideout-20&tag=5336612416-20"]Last Call: The Rise and Fall of Prohibition: Daniel Okrent: 9780743277044: Amazon.com: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51XSGncxZzL.@@AMEPARAM@@51XSGncxZzL[/ame]
[ame="http://www.amazon.com/One-Summer-America-Bill-Bryson/dp/0767919408/ref=sr_1_1?s=books&ie=UTF8&qid=1382313492&sr=1-1&keywords=one%20summer%20america%201927?tag=upsideout-20&tag=5336612416-20"]One Summer: America, 1927: Bill Bryson: 9780767919401: Amazon.com: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/515v1vziDSL.@@AMEPARAM@@515v1vziDSL[/ame]
There are a few more specific ones (e,g, on the Harlem Renaissance and Al Capone) in the thread..
http://historum.com/american-history/63560-20th-century-american-history-2.html