Are there any books that are solely or primarily about Ottoman empire's campaigns, wars, tactics and strategies, especially about the latter. I am currently reading Rhoads Murphey "Ottoman warfare" but in my opinion it is heavily diluted.
I liked Rhoads Murphey's Ottoman Warfare, but i agree it can be confusing to read. In any case, here's my recommendations
A Military History of the Ottomans by Mesut Uyar is pretty much the only single-volume book about the Ottoman military. It's very readable, chronological, and is well-researched. I highly recommend this if you want to know the general evolution of the Ottoman military
Ottoman Wars 1700-1870 by Virginia Aksan covers the wars of the latter stages of the empire, especially the well-overlooked campaigns of the early 19th century, comparison with the Austrian and Russian armies, and the performance of the Ottoman army. It could be heavy at times, but i think still readable. Aksan also planned to expand the book to 1918, which was set to release later this year.
As far as i'm aware, Ottoman tactics and strategies is relatively understudied. The Composition, Tactics and Strategy of the Ottoman Field Army at Zrínyi-Újvár and St. Gotthard (1663-1664) by Özgür Kolçak tells about the composition and tactics of the Ottoman army on those particular battles. If you can read Turkish, XVII. Yüzyıl Askeri Değişimi ve Osmanlılar: 1660-64 Osmanlı- Avusturya Savaşları by the same author further discuss tactics in details, from the usage of firearms by the Ottoman cavalry, line battles, and archery in Ottoman army.