I used to love these little books! They always came with a sheet of stickers that were so pretty I couldn't bear to actually peel them off of the paper.
This is the first in the Whisper the Winged Unicorn series, and appears to be by another author instead of the one who did most of the series. The story is simple - Whisper is nervous about flying and eventually gets some help from a magic tree or such.
The illustrations are...well, they are there. They have an odd charm of someone who's trying really hard and is good at drawing flowers but has no idea how to draw anything else. The other volumes have far superior artwork, but again, there is something kind of homey about these, like a parent's labor of love in making a homemade book for a child.
As is the same for a lot of other reviewers, this book was a key piece of nostalgia from my childhood. I was never fortunate enough to have the rest of the series, but I was always grateful to have my mother's copy. I lost it somewhere in life, and only recently was able to replace it- and the replacement still had the stickers, even! Even now as an adult, I still absolutely adore this little book.
I always wondered who the old guy on the stickers was. Is he from another book?