Bhagavad-gita is the instruction given by Krishna, and Srimad-Bhagavatam is the book containing topics exclusively about Krishna and His devotees. These two books are the special nectar of the words of Krishna.
Srimad Bhagavatam 4.4.44,
The Lord is the transcendental form of eternity, cognition and beauty.
Srimad Bhagavatam 1.5.20,
Srimad Bhagavatam should be heard by the bonafide representative in the Disciplic line.
Everyone is seeking Krishna, for He is the Supersoul of all individual souls.
Srimad Bhagavatam 10.9.21,
All the universes with innumerable stars and planets are controlled by the intelligence of the Personality of Godhead.
Srimad Bhagavatam 1.1.1,
Just as a bee is always interested in the honey in the flower and does not consider the thorns and colors, highly qualified persons, who are uncommon, accept only the good qualities of others, not considering their bad qualities, whereas the common man can judge what are good qualities and what are bad qualities.
Srimad Bhagavatam 4.4.12,