Antenna Design Book

Our company designs wearable computers that connect to a WiFi network. We mainly use PCB traces for the antenna (inverted F's).

Up to now, we have been outsourcing the antenna design. We now want to do the designs in house. Does anybody have a recommendation of a book for designing PCB antennas? I guess ideally we'd like one that is a little more practical (so one that minimizes the math).

Thanks.

Refer,

Compact and Broad Band Microstrip Antennas by Kin-Lu-Wong.
Planar Antennas for Wireless communications by Kin-Lu-Wong.

Regards,
balaguru.