Is the book Al-Asma' wa al-Sifat categorized under books of soft admonition and spiritual purification?

Speaking about the names and attributes of Allah and their meanings is among the greatest things that purify and soften hearts. Books that address this subject are considered works of purification and spiritual refinement. Among these books is: "And to Allah belong the Most Beautiful Names, so invoke Him by them - An Educational Study of the Faith-Based and Behavioral Effects of the Most Beautiful Names of Allah" by Sheikh Abdul Aziz Al-Jalil.