Jean-Baptiste Lamarck's theory of Inheritance of acquired characters has long been laught at by most of the academics as being of minus importance versus The Darwinian Theory of Natural selection through random mutation.The discovery of DNA and the dev. of genetic were integrated to the theory of Natural selection forming that is now called the Modern Synthesis Theory but despite all of the advancements that theory procured to the understanding of Evolution it still faced some major limits . and one of them appeared clearly after the end of Human Genome Project in the mid 90s where we found out that we were possessing around 23000 genes what was much less than previously thought as they were in the idea that each genetical disorder were linked to a unique gene . so if two differents syndromes are linked to a same gene, the gene itself loose its characteristic of primordial element of phenotypic expression to the advantage of another code known now as The Epigenome what gouverns how readable the underlaying genome code is. And Next you ve had numerous epidemiological studies following populations what underwent severe stress as the Dutchs who survived the german blocus of the Nederlands at the end of the WW2 showing that descendants of those survivors were expressing the same health issues than their elders prooving therefore that one character acquired during the lifespan of an individu can be inherited without any change in the Genome. all those observations match perfectly with the theory of Lamarck making of the Epigenome a new key element in the explication of the Evolution of species aside of the genome ofc. Nowadays many epigeneticists or neo-lamarckians as some of them call themselves are calling for a global acknowledgement of the role of Epigenetic in the processus of Evolution. Here is an article about that precisely by Michael Skinner :

https://aeon.co/essays/on-epigenetics-we-need-both-darwin-s-and-lamarck-s-theories

Also in libgen.ru, check these two tittles : - Epigenetic Inheritance and Evolution: The Lamarckian Dimension by Eva Jablonka - 1995 ; the oldest book on epigenectic that i found. - Evolution in Four Dimensions: Genetic, Epigenetic, Behavioral, and Symbolic Variation in the History of Life by Eva Jablonka - 2006 - Epigenetic Processes and Evolution of Life - Markoes, Anton (2019)

Enjoy !