The direct answer is that while the Mantra Mahodadhi is one of the most important encyclopedic texts on Tantra ever written, available English translation PDFs often suffer from severe structural and editing issues.
Reviewers from Vedic Books and Amazon highlight both the text's immense value and its technical flaws: Mantra-Mahodadhi of Mahidhara: A Board of Scholars Mantra Mahodadhi English Translation Pdf
Practical Tools: Instructions for Nyasa (placing mantras on the body), Homa (fire offerings), and Yantra construction. The direct answer is that while the Mantra
“I’m looking for a ghost,” Ananya replied. “A text. The Mantra Mahodadhi—‘The Ocean of Mantras.’ Supposedly compiled in 1460 CE by a sage named Mahidhara. But the only copies are locked in private libraries or lost.” Homa (fire offerings)