I thought it was an okay book. First of all, it took a long time for me to become hooked in the book (about 3/4th of the way through). Also, I found it a little confusing because it was written in the UK, so there were some British words in it. The book was about five students, who were completely different from each other, getting chosen to go on a school trip, but things started to happen when they went into the caves. The students names were Alex, Fiona, Angie, Liam, and Zesh. They had to go through and overcome rock falls, bats, arguments, betrayals, fear, and many more things. For instance, their teacher Mr Marks became unconscious from the first rock fall, so they had to carry him the rest of the way. Some of them thought about just leaving him behind, but others wanted to take him along. The book did not end the way I thought it was going to.