Before the internet there were encyclopedias, but before you try cramming a volume into your shirt pocket, pick up a Pocket Ref and start flipping. Whether you’re interested in fuels and combustion temperatures, dew point tables, the strength of wood beams, or the characteristics of various plastic pipe, this book has it all. 864 pages of references, tables, maps, formulas, conversions, and instructional guides. Try viewing all that on a single charge with your smartphone.