The frontman also updated fans on progress on his "spiritual memoir"

Billy Corgan has shared more details of new Smashing Pumpkins songs, reports Spin.

Last month, the frontman announced the band will release two new albums in 2015, with the titles ‘Monuments To An Elegy’ and ‘Day For A Night’.

Writing on Smashing Pumpkins official website, he wrote: “Worked through 4 songs today: TIBERIUS (with new and improved epic wizard part), THE SPANIARDS (de-lovely and expansive, set aside for ‘DAY FOR NIGHT;’ I think), OVERJOYED (a Howard fave, so you know what that means hand-waving fans), and MONUMENTS (which if memory serves had been COUGARED).”

He continued: “Not sure of our numbers now (as in 26 minus ?), but next week we’ll have to cut down to at least 12-13 songs for ‘Monuments’ album, with even more cuts to follow.”

Corgan also revealed his progress on his “spiritual memoir”, stating: “After many fits and false start I can now report that I’ve just finished Section 1 of my book, God Is Everywhere From Here to There; with 3 more sections planned. With Part 1 clocking in around 120,000 words, I’d anticipate with the current pace that the writing process will be finished sometime around the end of this year; or early next.”

“For those that don’t know, the book is set as a spiritual memoir and is a dream-like take on one person’s journey through temporal life. What it is not is a celebrity tale. Ostensibly each section breaks down into sub-sections, and in the case of Part 1, totaled 3 in all. While the narrative is somewhat linear, time is treated for what it really is: an illusion; and memory: our own myth.”