25NL: River Value with book?????????

[WC3V]

VIllain has been tight. After 35 hands running at 14/6/1

Is this a river value shove?

Ultimate Bet - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $23.75
Hero (BB): $56.20
UTG: $27.66
CO: $28.83
BTN: $16.99

Reads: <font color="blue">Villain is tight. Stats after 35 hands: 14.1/4.9/1</font>

Preflop: Hero is dealt 5[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] (5 Players)
3 folds, SB calls $0.15, Hero checks

Flop: ($0.50) K[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, Hero checks

Turn: ($0.50) K[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, Hero checks

River: ($0.50) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $0.50</font>, <font color="red">Hero raises to $2.00</font>, <font color="red">SB raises to $7.00</font>, <font color="red">Hero ?????????????