can one suggest a survey article on automorphisms of $p$ groups, and automorphisms of abelian groups/ abelian $p$ groups?
I second the recommendations of Steve D. in his comment: the paper of Hillar and Rhea and Khukhro's book are both excellent. The two volumes of Berkovich (and Janko for vol. 2) are, as Steve says, full of information but I have found that they do not make for a particularly enjoyable read.
You might also want to look at: "A survey on automorphism groups of finite p-groups" by Geir Helleloid and "Class preserving automorphisms of finite p-groups: A survey" by Manoj Yadav. I think there are copies of both of these on the Arxiv.
The paper "Some questions about p-groups" by A. Mann has a section discussing some open problems about automorphisms of finite p-groups & is well worth a read.