There are more than 50,000 printed books are collected in Library and further the Institute is continuously enriching its collection by acquiring newly published books by various means like purchase, getting as gifts and transaction basis. The Institute is also listed in Government organizations for free supplying of books viz Rashtriya Sanskrit Sansthan etc. This is a specialized biggest library for the Indological studies and research in India. Many Indian and abroad scholars regularly and frequently visit for their higher studies and research. The Books are mainly related to Jainism, Buddhism and Vedic studies in Sanskrit, Prakrit, Pali, Maru-Gurjar, Apabhrasha, Gujarati and Rajasthani Literature as well as Lexicons, Dictionaries, History, Culture, Archaeology, Art, Architecture, Iconography, Paleography, Epigraphy, Geography, Astronomy, Astrology, Ayurveda, Ancient Herbal and other Medicines, Ancient Sciences, Tantra, Mantra etc.
Late Muni Jambuvijayji, a great Saint Scholar of India, made Xeroxing and microfilming work of various Gyan Bhandars. The LDII also possess the Xeroxed and Microfilmed copies of these Manuscripts.
The Institute has a rich collection of nearly 75,000 rare manuscripts including a substantial number received as gift for the purpose of preservation and custody. Many manuscripts are written on Palm leaf, Birch-bark (Bhojpatra) and hand made paper. Some of the manuscripts are written in gold and silver inks and are full of multi-colour miniatures. The collection cover a wide range of subjects such as the Vedas, the Agamas, Tantra, Jaina Religion & Philosophy, Systems of Indian Philosophy, Grammar, Prosody, Poetics, Lexicography, Medicine etc. These manuscripts are in Sanskrit, Prakrit, Apabhramsa, old Gujarati, Hindi and Rajasthani languages. A large number of these manuscripts are illustrated both in vivid colours as well as black & white.
Some of the important and rare manuscripts preserved well in the Institute are: Yajurveda, Tripuri Upanishad by Shankaracharya, Bhaguri’s Smruti Samucchaya, Rangavijaya’s Gurjardesha Rajvanshavali Bauddhadipanca-darshana, Ramcandra’s Mahavidyalankara, Ruchidutta’s commentary on Tattavacintamani-Cintamani-Subodhika, Rajashehara’s Nyayakandalipanjika, Gopikanta’s Nyayadeepa, commentaries on Kumarasambhava, Kiratarjuniyam, Raghuvansha etc. Yavana-nqma-mala of some Mantri’s son, Himasagar’s Pashimadisha Chanda in Persian, Vilasavati Natika Rajimatiprabandha Nataka, Vivekamanjari, Sita Carita, Yoganibandhana, Rama Shataka, Hamsanidan, Sagachandrodaya, Pharasiprakash (Dictionnary), Yadusundara, etc.
Some of rare, illustrated mansucripts in the Institutes are: Shaliihotradi having 128 illustration of horses, Vyayamachintamani, illustrating different poses of physical exercises, Meghadoota (only one such manuscript known up till now), Uttaradhyayanasutra, Upadeshamala, Kalpassutra, Kumarasambhava, Gajastambha (having 42 illustrations of elephant), Badshah-chitravali illustrating the Muslim Kings, Gajachakra-Ashvacakra, having 50 illustrations, Madhumalati, Dhola-Maru having 65 illustrations, Gita-Govinda, Tulsi Ramayana etc.