A sample of the revised 2nd edition is available via New In Chess . Paper Copies: Find used or rare new copies at AbeBooks . Check for availability at ThriftBooks or Biblio . Volume 2: Technique and Praxis
Volume 2 covers advanced themes like intuitive sacrifices, king hunts, and enduring initiative. Go to product viewer dialog for this item.
This volume focuses on the core rules of attack, such as momentum and including all pieces in the offensive.
Jacob Aagaardās is a two-volume series highly regarded for teaching the principles of dynamic chess. While official PDFs for purchase are rare, excerpts and previews are available from major retailers, and physical paper copies can be found through various chess specialty shops. Volume 1: Basic Principles
Attacking Manual: Technique and Praxis: v. 2 By Jacob Aagaard