The blues world was much disturbed when they heard of last year’s passing of Atlanta guitarist extraordinaire Sean Costello, who, a day shy of his 29th birthday, was clearly one of the young lions of the genre. But like Magic Sam, Hollywood Fats, and to a lesser extent, Stevie Ray Vaughan, we are left to wonder, “What if?” The material here comes from three Landslide studio albums dating from1996, 2000, and 2001, as well as several live dates. The set opener, “Take Me Back,” is a scorching shuffle in the tradition of Gatemouth Brown. However, Costello’s overriding influence is Otis Rush, as he covers a couple of his songs here and his originals are often Rush-like. This is a blend of originals and covers, with the songbooks of the first Sonny Boy Williamson, J.B. Lenoir and Johnny “Guitar” Watson, among others, being sampled. There are a couple of guest vocalists here, but I prefer Costello’s at times tortured singing as his voice was just as powerful as his guitar playing. Twenty tracks, and every one has something to offer. This is a highly recommended tribute CD, but it does unfortunately lead one to wonder, “What if?”