# Professional CMake: A Practical Guide 21st Edition
**URL:** https://discourse.cmake.org/t/professional-cmake-a-practical-guide-21st-edition/14127
**Category:** Community
**Created:** [May 20, 2025, 2:24pm UTC](https://discourse.cmake.org/t/professional-cmake-a-practical-guide-21st-edition/14127 "2025-05-20T14:24:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@craig.scott](https://discourse.cmake.org/u/craig.scott)
#### Post date: [May 20, 2025, 2:24pm UTC](https://discourse.cmake.org/t/professional-cmake-a-practical-guide-21st-edition/14127/1 "2025-05-20T14:24:23Z")
The 21st Edition of the book _Professional CMake: A Practical Guide_ is now available. It has been updated for the CMake 4.0 release. A new _Debugging Executables_ chapter has been added, focusing on debugging within IDE environments. The _Policies_ chapter also saw some important changes, motivated by the CMake 4.0 release completely removing `OLD` policy behaviors for the first time.
More detailed [release notes](https://crascit.com/professional-cmake/release-notes/21st-edition/) are available. As usual, the book is available exclusively from [https://crascit.com/professional-cmake/](https://crascit.com/professional-cmake/)
[](https://crascit.com/professional-cmake/)
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### Author:  [@LegalizeAdulthood](https://discourse.cmake.org/u/LegalizeAdulthood)
#### Post date: [May 20, 2025, 4:10pm UTC](https://discourse.cmake.org/t/professional-cmake-a-practical-guide-21st-edition/14127/2 "2025-05-20T16:10:39Z")
Just want to say that I have found this book to be invaluable to me as a C++ developer using CMake. Thanks for continuing to update the book! (In case others didn’t know, a purchase of this book gives you access to all subsequent editions as well.)