There are similarities between Redmond O'Hanlon's magnificent Into The Heart of Borneo and No Mercy. In both, O'Hanlon's keen naturalist eye notes the details (tiny scarlet flowers probed hummingbird-like by purple-red hawkmoths), his wit (usually at his own expense) remains funny, and his travel companions quite human and often endearing. He's off on another jungle trek, this time seeking Mokele-mbembe, the alleged Congo sauropod. But No Mercy goes deeper and darker; fear and anger intrude on the levity, rationalistic thought yields to palpable fetishistic fright the deeper in they go, and O'Hanlon emerges a changed, more compassionate man.