The 75-year-old singer abandoned the Asian leg of his world tour in April (16) to be with his wife of 59 years, Lady Melinda Rose Woodward, as she battled cancer. She passed away at a hospital in Los Angeles later that month.

The Welsh crooner was scheduled to return to performing with a gig at London's Hampton Court Palace on 8 June (16), but has now announced he will give a talk at the prestigious literature festival three days before the concert.

"Very pleased to be talking at @hayfestival in Wales on 5th June," the veteran star wrote on Twitter.

At the event, held in the picturesque market town of Hay-on-Wye, Wales, from 26 May to 5 June (16), Tom will discuss his autobiography Over The Top And Back, released last year (15).

In the lead up to the book's release, the Delilah musician opened up to Britain's Sunday Times magazine about how a previous battle Linda fought with colon cancer had led to him telling his son and manager Mark, "If your mother dies, I won't be able to perform any more."

In the interview he also described Linda as, "An unbelievable woman and the most important thing in my life."

Despite his reservations about continuing his music career after the death of his wife, earlier this month (May16) Tom announced that he would be going ahead with gigs in the U.K. and Europe planned for this summer.

"Seeing some unexpected press over the weekend, I came to the conclusion that singing really is my best therapy," Tom recently wrote on his Facebook page. "Music is so important to me—it’s my life, and through the brightest and darkest of times it has embedded a soundtrack to all my memories.

"So, it means a huge amount to be able to continue to perform for such a loyal and giving audience; your support has been uplifting and doesn’t go unnoticed. See you all at the shows this Summer."

In addition to his British and European summer shows, Tom will play gigs on the Caribbean island of Curacao in September and at Los Angeles' Hollywood Bowl venue in October, along with Van Morrison.