Interestingly, while the 1965 book is hard to find for free, Ansoff’s later works are often available in the public domain or via open access. If you want the essence of the 1965 strategy without the copyright hurdle, search for:
If you simply cannot find the 1965 original, don’t get stuck. Ansoff updated his own work in Implanting Strategic Management (1984) and The New Corporate Strategy (1988). ansoff 1965 corporate strategy pdf free
However, for the purest, most academic look at the original matrix, I highly recommend buying a used copy of "Corporate Strategy (Revised Edition)" from AbeBooks or eBay. You can often find it for under $10 plus shipping. Interestingly, while the 1965 book is hard to
Ansoff introduced the idea that a firm must align its internal capabilities (aggressive, stable, or reactive) with environmental turbulence. This is a nuance lost in modern summaries. The good news: You don’t need to pirate it
Here is the honest, lawyer-friendly truth:
The 1965 edition of Corporate Strategy by McGraw-Hill is still under copyright. You will find many websites claiming to offer a "free PDF," but these are almost always:
The good news: You don’t need to pirate it. The book was re-published in a revised paperback edition (Penguin, 1987) which is widely available.