"We have tried to work with the farmers and the labourers and always tried to uphold their interest. If we analyse, we will find that in last 30 years the party has changed according to the requirement of the day," West Bengal Industry minister Nirupam Sen said.

"For this change we have often been misunderstood. I have tried to explain this change and analyse it in my essays," Sen said at the release of his book.

A collection of essays - Bikalper Sandhane - written by the minister was released by CPI(M) state secretary Biman Bose at the party office in Kolkata.

"In this age of liberal economy it is impossible to stand apart and make a way and so CPI(M) has gone for an alternative economy and politics which is evident from Sen's observation" Bose said.

"We have our limitations and for that we have often been misunderstood by political parties, including our partners and by the people. These essays will help the people understand how we have worked for the people despite our limitations" Bose said supporting Sen's statement.

The book is a collection of 16 essays written by the minister in party papers in the past few years. Apart from that, his lectures at different seminars have also found a place in the collection.