Eu encontrei! Isso quase não pode ser isso! Você está procurando pelo The Dream Merchant , um romance holandês de Isabel Hoving. Seu título original era De gevleugelde kat (traduzido: The Winged Cat) Foi publicado pela primeira vez em 2002.
Por algum motivo, sua descrição da pulseira de cobra acionou uma lembrança, mas tenho 100% de certeza de que nunca li o livro antes:)
Twelve year old Joshua Cope is contacted by a corporation called Gippart International one day late at night. Joshua and his friend, Bhasvar (Baz) Patel go to Gippart and meet Max Herbert, a talent scout. Josh is sent into a dreamworld to sell products. But dreams also come with nightmares...
Umaya, the collective dream of everyone at that point in time, is caught between dreams and reality. Josh, Baz and a fellow associate Teresa cannot get out of the dream-world, where time is running backwards due to a Gippart employee attempting to break into real time rather than dream-time. Along his adventure, Josh meets his dead twin sister Jericho, who has been attempting to get in contact with him for 350 years. But with Jericho comes Lucide, a guardian who makes sure that no one crosses the borders of life and death.
The members of this troop find themselves with powers that they cannot explain. Baz, the first to find his powers, can control dream time by listening to the rhythm and matching it, causing it to slow, stop, or even rewind. Teresa changes Umaya with words, influencing people and surroundings to her will, she is the group storyteller. Josh is a thief and can change the very nature of things just by looking at them. However, they are trapped in umaya, the dream-world.
The four children must find Tembe at the end of time and fulfill Siparti's last promise to Temberi. They learn about each of Siparti's six kids and put together the clues that each of them hold.
After a harrowing ordeal, Josh, Jericho, Baz, Teresa, and Mervin Spratt manage to find their way to the edge of time itself, where the Tembe people live in a crumbling Fortress. The Tembe, descended from Temberi, have been trapped at the edge of time for over 1000 years. Luckily, the Tembe are friendly people, and show the associates how their Fortress is slowly being ripped away into the hurricane whom they have named Satura. Using the powers they gained in the journey, the children manage to find their way through the hurricane back into the real world.
Encontrei no Google usando esta consulta de pesquisa: "book dreamworld snake bracelet"