Instruct: Classify a review into positive or negative sentiment.
Query: VARRY INFORMATIVE

VARRY INFORMATIVE! EXTREMLY DEATAILED! GOOD AUTHER VARRY OPEN AND WILLING TO EXEPT NEW THERIES AND SINENTIFIC INVESTIGATION! THIS INFO HAS BEN SECRET FOR HUNDREDS OF YEARS AND IS NOW JUST STARTING TO BECOME AVALIBLE! GET THE BOOK BEFOR THIS ONE TO!