Humanity's favorite emotion is love. Our culture is centered on love and built around it. Our love comes in many different flavors and kinds. It is sexual love, love of children, parents, relatives, friends, pets, animals, nature, individual humans, human groups and humanity as a whole, of god, angels and more.
This book is an expression of love for extraterrestrials. It would be unusual in mainstream society but in the New Age crowd, you would frequently find this form of love. We love you.