1636: The Ottoman Onslaught

Book #21 in the multiple New York Times best-selling Ring of Fire series. The uptimers and their allies take on the Ottoman Empire at its height of power.
The modern West Virginia town of Grantville has been displaced in time to continental Europe in 1632. Now four years have passed. The long-feared attack on Austria by the Ottoman Empire has begun. Armed with new weapons inspired by the time-displaced Americans of Grantville, the Turks are determined to do what they were unable to do in the universe the Americans came from: capture Vienna.
The Ottomans have the advantage of being able to study the failings and errors of their own campaigns in a future they can now avoid. They are led by the young, dynamic, and ruthless Murad IV, the most capable emperor the Ottomans have produced in a century. They are equipped with weapons that would have seemed fantastical to the Turks of that other universe: airships, breech-loading rifles, rockets—even primitive tanks.
And this time they won’t have to face massive reinforcements from Austria’s allies. In fact, the only force Emperor Gustav Adolf can think of sending to Austria is the United States of Europe Third Division under the command of Mike Stearns. It’s an army currently engaged in a desperate struggle for Bavaria.
The emperors of the USE and Austria share the same problem. They have one too many enemies, one too few allies, and only one general to cover the gaps. Fortunately, that general is Mike Stearns, also known as the Prince of Germany. 
About 1635: A Parcel of Rogues:
"The 20th volume in this popular, fast-paced alternative history series follows close on the heels of the events in The Baltic War, picking up with the protagonists in London, including sharpshooter Julie Sims. This time the 20th-century transplants are determined to prevent the rise of Oliver Cromwell and even have the support of King Charles."—Library Journal
About 1634: The Galileo Affair:
"A rich, complex alternate history with great characters and vivid action. A great read and an excellent book."—David Drake
"Gripping . . . depicted with power!"—Publishers Weekly
About Eric Flint's Ring of Fire series:
“This alternate history series is . . . a landmark…”—Booklist
“[Eric] Flint's 1632 universe seems to be inspiring a whole new crop of gifted alternate historians.”—Booklist
“ . . . reads like a technothriller set in the age of the Medicis . . . ”—Publishers Weekly