wallace has worked in other literary genres, always from a conservation stance. two novels are "ecothrillers" revolving around issues like endangered species and wilderness protection. two books on evolutionary history, the bonehunters' revenge and beasts of eden, try to stress the importance of evolution as a matrix for the human past and future. the national audubon society and wildlife conservation society commissioned two of wallace's books, life in the balance and adventuring in central america as ways of informing the public on conservation concerns through television and ecotourism.