Waves of Devotion is meant to compliment The Nectar of Devotion and the author encourages readers to read this book along with The Nectar of Devotion.
“With some exceptions, Srila Prabhupada at least briefly summarized every verse in Bhakti-rasamrta-sindhu. Consequently, I was able to solidly base the present book on his authoritative statements. Therefore we have entitled the book Waves of Devotion.
“Waves are born from the ocean, heighten the ocean, and then merge within it. Similarly, the explanations in Waves of Devotion are born from statements in The Nectar of Devotion. They further explain Srila Prabhupada’s statements and therefore expand them. Finally, after hearing these explanations one will find the very same points in Srila Prabhupada’s own statements. Waves of Devotion will then merge within the ocean of The Nectar of Devotion.
“Waves are not just born from the ocean, their very existence depends upon its support. Similarly, every comment in Waves of Devotion is authorized by and depends upon a corresponding statement from Srila Prabhupada’s The Nectar of Devotion.”