Well, tactics are a very important aspect of the game, no doubt. But the great thing about Silman is he conceptualizes strategy in a way players like you and me can readily understand. After digging into a new book, sometimes immediately after your results will suffer because you haven't learned how to incorporate the new knowledge into your play. One solution is to play often (and serious games) while taking your time with a new book.
In any case, I woudln't excpect that book to work well with tactics... they're different areas. However for players who are a lacking a good strategic foundation this book can't help but to improve their play.
Has anybody read The amatures Mind: Turning Chess Misconseptions into Chess Mastery By Jeremy silman?
If so what do you think, a few reviews say its a great book and 1 or 2 ive read say it doesnt work well with tactics.