by polarbuddha101 » Thu Mar 14, 2013 7:31 pm
I don't know about a book on mundane buddhist teachings but there is a great thread on here about suttas for the householder which definitely has some stuff that could be considered mundane such as how to spend money wisely.
viewtopic.php?f=14&t=259
"I don't envision a single thing that, when developed & cultivated, leads to such great benefit as the mind. The mind, when developed & cultivated, leads to great benefit."
"I don't envision a single thing that, when undeveloped & uncultivated, brings about such suffering & stress as the mind. The mind, when undeveloped & uncultivated, brings about suffering & stress."