I think Edward J. Erickson's Gallipoli: Command Under Fire is what you are looking for. It is an almost three hundred pages long book devoted solely to the Gallipoli campaign. The author discusses in great detail the build-up to the campaign, the decision-making process leading to it, the offensive and defensive plans of the parties, and how and when events actually developed in specific locations. It has a lot of endnotes and, more importantly for you, a quite extensive select biography. You can check the books Erickson lists there for further reading. His list includes many other books devoted to the Gallipoli campaign, like an older book published by Osprey (a top military history publishing house) on the subject titled Gallipoli 1915 by Philip Haythornthwaite.

You can also proceed with Erickson's Ordered to Die: A History of the Ottoman Army in the First World War which is about the Ottoman Army in WW1 in general.

Mesut Uyar has a recent book (2020) published by Routledge titled The Ottoman Army and the First World War. This too would be good to learn about the Ottoman Army at the time in general, including in the Gallipoli campaign. I think Uyar also wrote a short book on (and titled!) the Ottoman defence against the Anzac Landing, 25 April 1915. You can find it here, uploaded on his Academia page: https://www.academia.edu/9403909/25_April_1915_The_Ottoman_Defence_Against_Anzac_Landing

I hope these help!