Any other recommendations are most welcome.
"Attack and Defence" Vs "Chess Tactics for Advanced Players"

Attack and Defence has Dvoretsky's thoughts on Kotov's tree of analysis, along with a bunch of annotated games and exercises by Yusupov et al. It touches on tactics indirectly, but is not about tactics per se. It's not even about attack nor defence.
In Averbakh's Chess Tactics for Advanced Players, he puts forward the theory that all tactics boil down to a double attack of some sort.
Tal's Winning Chess Combinations has perhaps the most thorough treatment of tactical motifs, and Yusupov's nine book series (The Fundamentals Build Up Your Chess, etc.) also has good coverage of the most common motifs.
Volokitin's Perfect Your Chess and Hort and Jansa's The Best Move are collections of very advanced tactical problems.
Analytical Manual is a collection of Dvoretsky's columns, some on calculation and some on the endgame. There is a little bit of overlap in themes with Attack and Defence, but the material is newer.

Ah quite true. Dvoretsky, Volokitin and Hort/Jansa are for expert level or higher players. Yusupov starts easy, and works his way up, while Tal and Averbakh are probably readable enough if one can follow chess notation.

Thanks so much for your help & recommendations fellows!
I'm currently collecting books that would make a kind of a fine long self-learning course for me, starting with Silman's "How to Reassess Your Chess" and ending with Dvortesky's Manuals. I have no big difficulty in understanding advanced books, not out of being an advanced player but out of being used to reading Chess books.
Thanks for your help again & wish me luck :)
Hi all!
I was thinking about buying a book which focuses more on Tactics, "Attack and Defence" by Dvortesky and "Chess Tactics for Advanced Players" seemed to be good, but I don't know which to start with.
Note: I have "Dvortesky's Analaytical Manual" so does it make buying any of the two unworthy?
Thanks in advance.