I hope the book made it clear that these values are for grass. Don't try these sorts of crosswinds on tarmac in a Tiger Moth.
Also, the Tiger Moth needs left rudder to keep straight during the take-off roll (full-power), but the throttle is normally shut before the flare, when landing. Even a power-on "wheeler" landing (for blustery crosswinds) will only use a small amount of power.