Pattaya is not well served with bookshops of any kind, to put it mildly. The only easily accessible second hand one that I knew of, by the Soi Buakao market, seems to have become another casualty. Christianpfc might know of one or two tucked-away ones. Shameless plug: my collection of gay short stories set in Thailand (‘If Truth Be Told’) is currently on sale at Dick's Cafe in Jomtien at 200B.