Used in my Borrowed World series, this filter has reliably served hundreds of thousands of hikers on their wilderness treks.

Books
Boondock Pilgrims – The Way of Dan 3
Book 3 in The Way of Dan series showed up yesterday in all formats. If you’ve not tried this series you’ll need to start with Burning Down Boise. The audio is done by Kevin Pierce, the voice of nearly all of my audiobooks. Boondock Pilgrims on Amazon Audiobook