For a book about all 24 Tirthankars, a good Jain starting point is:

• Śvetāmbara tradition: Kalpa Sūtra
• Detailed traditional biographies: Triṣaṣṭi-Śalākā-Puruṣa-Caritra by Acharya Hemachandra

For a simple overview of all 24 Tirthankars, you can also read this Jain Knowledge page:

If you want, I can also tell you the best Jain book for beginners on the 24 Tirthankars.