An Illustrated Guide to Wild Agarics of Haryana is an addition to the mushroom biota of India. This is a first compiled document containing the taxonomic information about lamellate mushrooms existing in the natural habitats of Haryana. Till the time of its publication, there is no available record in the form of book having such content from this state. It includes the detailed description of 51 agaric species encountered from the three districts namely, Panchkula, Ambala and Yamunanagar. These species belong to the three orders of class Agaricomycetes, namely Polyporales, Agaricales and Russulales. Each species has been illustrated and taxonomically described and field photographs of sporocarps, photomicrographs and line drawings are provided in the guide for better understanding of the individual taxon. The information about edibility status and medicinal value of these species is also discussed in the book wherever possible. The exact localities and their altitudinal range have been mentioned from where the respective species have been collected during the excursions. In addition to this, identification keys of the documented taxa to their respective orders, families, genera and species have also been provided. This compilation will be of immense use to the students, teachers and the researchers in easy recognition of the mushrooms included in this treatise.