This wonderful writer combines the talents of Alfred Wallace and the Monty Python Troupe. Irreverent and with a highly developed sense of the absurd, O'Hanlon also has a fine eye for the details of natural history; he even gives Latin names and includes an extensive bibliography on the region. This was his first travel book, the entertaining and informative story of a journey into the mountains of Sarawak with poet and friend James Fenton.  (BRN03, $14.00)