Here are some reliable books and resources where Jain pādukā (foot‑print) iconography is treated in a serious, traditional way. As far as current scholarship shows, there is no major book only on Jain pādukā, but they are discussed in detail within broader works on Jaina art and iconography.

1. “Jaina Iconography” – Jyotindra Jain & Eberhard Fischer

• Classic academic work on Jain images and symbols.
• Discusses:

- Aniconic forms of worship (like pādukā / caraṇa‑chihna). - How footprints of Jinas and ācāryas are represented and worshipped.

• Helpful for understanding:

- Why Jain tradition uses footprints (not only statues). - Differences in treatment between Śvetāmbara and Digambara practices.

2. “Jaina Art and Architecture” (multi‑volume, ed. U.P. Shah, et al.)

• Standard reference set on Jain art.
• Volumes include:

- Sections on memorial shrines, samādhis and pādukā, especially on hills like Girnar, Shatrunjaya, Shravana‑Belgola, etc. - Photos and descriptions of pādukā installed for tīrthaṅkaras and monks.

• Good for visual examples and regional styles.

3. Books on specific Jain pilgrimage sites (Tīrthakshetra‑grantha)

Many Jain pilgrimage guidebooks (often in Gujarati / Hindi) have chapters or photo‑sections on pādukā:

• Shatrunjaya / Palitana tirth books
• Sammed Shikharji tirth books
• Shravanabelagola tirth books

Look for chapters titled “caraṇa,” “pādukā,” “charan‑chinh,” “samādhī,” “nisihiyā” etc. These often include:

• Historical notes about whose footprints are there.
• Traditional stories (itihāsa / prabhāvanā) connected with each pādukā.

4. General works on Jaina art, where pādukā appear regularly

These are not pādukā‑only, but usually have images and brief discussions:

• Umakant P. Shah – various books on Jaina sculpture and art
• Kirit Mankodi / P. Pal / J. Cort – studies of Jain bronzes and stone images
• Art‑history books or catalogues of Jain collections (museums) often include:

- “charan‑chinh of Jina” - “pādukā of muni / ācārya” - Photo plates with iconographic description

5. For understanding the religious meaning behind pādukā

Apart from art‑history, you can also study:

• Texts and commentaries on guru‑bhakti and samādhimaraṇa / sallekhanā, where pādukā of siddha‑munis and ācāryas are mentioned as objects of deep reverence.
• Traditional Jain tirtha‑māhātmya literature (narratives praising holy places) often explains:

- Why a particular pādukā is considered siddha‑sthala (site of liberation). - How darshan and vandan of these footprints is done by both Śvetāmbara and Digambara.

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If you tell me:

• which language (English / Hindi / Gujarati, etc.) and
• whether you want scholarly art‑history or devotional / traditional books,

I can narrow this to a very short, focused list of specific titles and publishers that you can practically look for.