MONTHS != date +%B && date -d '1 month' +%B
IP != dig +short myip.opendns.com @resolver1.opendns.com
CITY != curl -s http://api.db-ip.com/v2/free/$(IP) | grep city | cut -d: -f2 | tr -d '"'

TITLES = $(MONTHS)
TITLES += $(CITY)

BOOKS = $(patsubst %,Books/%.md,$(TITLES))

$(BOOKS):
	@mkdir -p $(@D)
	fortune -l > $@

progs += $(BOOKS)

dross += Books/