King Solomon's Mines is a very fun book, and one I very highly recommend. If you like adventure stories, stories set in British Africa, stories about lost treasures or brave explorers, then I recommend it to you. Considering it was written well over a hundred years ago, it still is worthwhile to read, and I'm glad I did.
The basic story:
Allen Quatermain has made his home in Africa, and while on a ship back to his home, he enters into conversation with two men, one of whom has decided to go and look for his brother whom he has not seen in some time and whom he fears to be lost. It turns out that his brother may have gone to seek the lost diamond mines of King Solomon, and on hearing this, Quartermain tells of an old map which has come into his possession, telling the location of this alleged treasure. The three set out with a Zulu native, who has his own reasons (untold to the group) as to why he wants to accompany them. Along the way they have some strange encounters, none the least of which is an evil witch.
Very very fun, and you can almost hear the theme song to the Indiana Jones movies as you read!