Cyrus Ingerson Scofield was a lawyer who served as U.S. District Attorney for Kansas, and later became an evangelical Christian minister whose writings popularized premillenial dispensationalism among fundamentalists.
Scofield, of course, was a knowledgeable and still well known Bible scholar of the turn of the 20th century. In the early 1970s, Baker compiled a handful of his lessons/sermons on the Holy Spirit into this little book. I'm sure it has been out of print now for decades, and won't ever be back in print.
As a work, it shows the typical precision we would expect of Scofield. Sometimes too much precision. He slots things into doctrinal placement and timelines with entire surety, seemingly. Yeah, too much precision. It is also rather incomplete for a study on the Holy Spirit being so limited in size. Nevertheless, it is not without merit. The chapter on the fulness of the Holy Spirit is especially good.
If you have it, take an hour and read it. It will do you good to think through these aspects of the Holy Spirit. But it isn't worth searching for and obtaining, in my opinion.
So glad I read this little book. Only wish I'd known about it decades ago! I learned that on the day of Pentecost -- when believing Jews received the promised gift of the Holy Spirit -- their experience was different from the impartation received by newly believing Gentiles in the house of Cornelius. With the Jews there was a period of time between their receiving Christ by faith and receiving the baptism of the Holy Spirit. And it was common for the disciples to impart the Gift either by the laying on of hands or prayer. But wherever the Gospel was believed among the Gentiles the Holy Spirit regenerated, empowered and baptized them into the Body of Christ the moment they received the Lord Jesus.