
The most detailed Sanskrit grammar available, although unfortunately never finished: the completed volumes cover phonology, morphology of the noun, and nominal derivation. Basically a reference for Sanskrit syntax, but designed to be a progressive composition textbook, with exercises. Girgaon: The Standard Publishing Company, 1925. The Student’s Guide to Sanskrit Composition. It badly needs updating - it was written at a time when “syntax” basically meant case usages - but it remains somewhat useful. The only book of its kind (in English: see Delbrück’s book below). Sanskrit Manual: A quick-reference guide to the phonology and grammar of Classical Sanskrit.
It has some idiosyncracies and redundancies, but it offers very detailed rules on matters that other authors leave to memorization. Hence this book is somewhat like the Kāśikā-vr̥ttī in the guise of a European reference grammar. Müller tried to follow the “native grammarians” as closely as possible. Revised and abridged by Arthur Anthony Macdonell. References to Pāṇini’s sūtras are given, but not consistently. A detailed list of paradigms, covering almost all of the forms you are likely to encounter.University, Ala.: University of Alabama Press, 1968. A Concise Elementary Grammar of the Sanskrit Language, with Exercises, Reading Selections, and a Glossary.
It is probably the most practical grammar, and the easiest to navigate and consult.
This is a revised version of his abridgement of Max Müller’s grammar (see below).
A listing of all of the verbal roots of Sanskrit and which forms are made from them, classified according to their attestation. The Roots, Verb-forms, and Primary Derivatives of the Sanskrit Language: A Supplement to His Sanskrit Grammar. Whitney was rather disparaging of the “native grammarians” (and the modern scholars who followed them), so you will have to look elsewhere (like Kale or Müller) if you more are interested in the language described by Pāṇini. The most comprehensive grammar in English, which focuses especially on the Vedic phase of the language.