I like math, so "Princeton Companion to Mathematics" looks nice. (This book: http://www.amazon.com/gp/product/0691118809/ref=s9_simh_gw_p14_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=1MG63MK6A00BKV2FEKTB&pf_rd_t=101&pf_rd_p=470938631&pf_rd_i=507846 )
But I like economics too and I'm...
