Snail
I remember the cover was very vibrant with a bunch colorful paintstripish lines all over the book in a black background the title was one word in white in the cover it was about a boy who had a a magical shapeshifting forest in his backyard that he went further and further into each time he meets a girl from a somewhat troubled home and they explore the forest together there’s a place in the forest that’s all spongy from what I remember and the imagery in this book is amazing I remember there’s a map of the forest in the book naming each place in the forest I remember reading this boom from 2011-2015 and it is not a very mainstream book when I searched this book up a few years back on amazon one of the reviews actually said that they got the book for free as some people where handing it out for free
Mai
This one that came up in a search seems to match your description: Too Far by Rich Shapero I know it's two words but they are white and sort of close together on the cover! A few Amazon reviews mention that they were giving away free copies of this book in their college campus. They also mention the map.