Abstract：Classification of Book Review Sentiment in Bangla Language Using NLPMachine Learning and LSTM Books are said to be the best friend a person can haveBook reading culture dates back to almost a couple of thousands of yearsAfter ancient civilizations learned to writethey stored information in tablets or walls or stones are said to be the predec Consulting Service and Retrieval and Indexing This article focuses on using machine learning and deep learning methods to analyze Bengali book reviews to provide feedback on books and online bookstoresNatural language processingNLPis used for text preprocessingVarious popular algorithms were adopted in the studyincluding Support Vector MachineSVMDecision TreeKNNRandom ForestLogistic Regressionand Long Short-Term MemoryLSTMfor sentiment classificationAmong themLSTM achieved the highest accuracy of 9749