A book that leaves you hanging from start to end. The title is a good example "Learn Tamil in 30 Days", this is never explained and seems very arbitrary. The book is short, perhaps if you read it once a day every day for 30 days?
The positive: it is cheap and better than nothing.
Really a bad dictionary/grammar/phrasebook. Not of much use, but one good thing is that the original Tamil writing and the transliteration is always given. Other than that, I doubt that anyone can learn Tamil with this book. Especially not within 30 days.